[docs] Add QoI to Lexicon.rst
[docs] Add QoI to Lexicon.rst

I had seen this term in several Swift discussions, and it took me quite a
bit of searching online before I could make a guess as to what it meant.
Add it to the lexicon.

tkremenek/swift,allevato/swift,kstaring/swift,hughbe/swift,jmgc/swift,codestergit/swift,uasys/swift,codestergit/swift,karwa/swift,ben-ng/swift,modocache/swift,devincoughlin/swift,danielmartin/swift,aschwaighofer/swift,felix91gr/swift,ken0nek/swift,bitjammer/swift,hooman/swift,uasys/swift,kperryua/swift,airspeedswift/swift,deyton/swift,modocache/swift,tinysun212/swift-windows,austinzheng/swift,jtbandes/swift,airspeedswift/swift,jtbandes/swift,tkremenek/swift,practicalswift/swift,ken0nek/swift,rudkx/swift,ben-ng/swift,deyton/swift,aschwaighofer/swift,calebd/swift,frootloops/swift,tkremenek/swift,johnno1962d/swift,johnno1962d/swift,therealbnut/swift,alblue/swift,jopamer/swift,OscarSwanros/swift,uasys/swift,harlanhaskins/swift,rudkx/swift,milseman/swift,arvedviehweger/swift,gregomni/swift,JaSpa/swift,JGiola/swift,karwa/swift,ahoppen/swift,codestergit/swift,rudkx/swift,ken0nek/swift,calebd/swift,benlangmuir/swift,nathawes/swift,bitjammer/swift,tardieu/swift,practicalswift/swift,CodaFi/swift,swiftix/swift,jmgc/swift,ben-ng/swift,hooman/swift,shahmishal/swift,lorentey/swift,nathawes/swift,harlanhaskins/swift,benlangmuir/swift,huonw/swift,hooman/swift,tjw/swift,devincoughlin/swift,stephentyrone/swift,atrick/swift,johnno1962d/swift,milseman/swift,lorentey/swift,natecook1000/swift,JaSpa/swift,gmilos/swift,gottesmm/swift,tardieu/swift,xedin/swift,tardieu/swift,jopamer/swift,tjw/swift,roambotics/swift,arvedviehweger/swift,amraboelela/swift,alblue/swift,gregomni/swift,tjw/swift,therealbnut/swift,kstaring/swift,brentdax/swift,modocache/swift,shahmishal/swift,milseman/swift,swiftix/swift,dreamsxin/swift,danielmartin/swift,CodaFi/swift,lorentey/swift,bitjammer/swift,gmilos/swift,huonw/swift,shahmishal/swift,shajrawi/swift,swiftix/swift,zisko/swift,jtbandes/swift,shahmishal/swift,roambotics/swift,lorentey/swift,gregomni/swift,sschiau/swift,tkremenek/swift,xedin/swift,ben-ng/swift,alblue/swift,Jnosh/swift,jckarter/swift,deyton/swift,devincoughlin/swift,jckarter/swift,manavgabhawala/swift,bitjammer/swift,bitjammer/swift,gribozavr/swift,tjw/swift,hughbe/swift,lorentey/swift,johnno1962d/swift,xwu/swift,huonw/swift,apple/swift,danielmartin/swift,benlangmuir/swift,uasys/swift,allevato/swift,gottesmm/swift,frootloops/swift,milseman/swift,felix91gr/swift,johnno1962d/swift,therealbnut/swift,karwa/swift,jopamer/swift,huonw/swift,nathawes/swift,ken0nek/swift,felix91gr/swift,xedin/swift,alblue/swift,JaSpa/swift,rudkx/swift,hooman/swift,natecook1000/swift,lorentey/swift,brentdax/swift,felix91gr/swift,JGiola/swift,roambotics/swift,parkera/swift,ahoppen/swift,IngmarStein/swift,shajrawi/swift,practicalswift/swift,huonw/swift,parkera/swift,jmgc/swift,frootloops/swift,allevato/swift,tinysun212/swift-windows,jtbandes/swift,alblue/swift,therealbnut/swift,IngmarStein/swift,CodaFi/swift,xwu/swift,djwbrown/swift,kstaring/swift,gregomni/swift,tjw/swift,Jnosh/swift,codestergit/swift,tkremenek/swift,rudkx/swift,allevato/swift,benlangmuir/swift,jckarter/swift,jopamer/swift,practicalswift/swift,johnno1962d/swift,russbishop/swift,lorentey/swift,sschiau/swift,codestergit/swift,IngmarStein/swift,modocache/swift,return/swift,arvedviehweger/swift,manavgabhawala/swift,arvedviehweger/swift,airspeedswift/swift,zisko/swift,shajrawi/swift,atrick/swift,stephentyrone/swift,nathawes/swift,jtbandes/swift,russbishop/swift,djwbrown/swift,felix91gr/swift,sschiau/swift,jmgc/swift,jmgc/swift,swiftix/swift,return/swift,parkera/swift,OscarSwanros/swift,jckarter/swift,jopamer/swift,therealbnut/swift,JGiola/swift,OscarSwanros/swift,devincoughlin/swift,karwa/swift,amraboelela/swift,parkera/swift,roambotics/swift,ken0nek/swift,ahoppen/swift,uasys/swift,JaSpa/swift,natecook1000/swift,zisko/swift,harlanhaskins/swift,shajrawi/swift,tardieu/swift,aschwaighofer/swift,brentdax/swift,djwbrown/swift,apple/swift,parkera/swift,xwu/swift,glessard/swift,amraboelela/swift,modocache/swift,swiftix/swift,hooman/swift,jopamer/swift,JaSpa/swift,brentdax/swift,arvedviehweger/swift,tinysun212/swift-windows,jckarter/swift,tardieu/swift,manavgabhawala/swift,aschwaighofer/swift,calebd/swift,zisko/swift,jckarter/swift,glessard/swift,airspeedswift/swift,atrick/swift,deyton/swift,russbishop/swift,russbishop/swift,stephentyrone/swift,CodaFi/swift,practicalswift/swift,codestergit/swift,jtbandes/swift,ken0nek/swift,IngmarStein/swift,shajrawi/swift,JGiola/swift,modocache/swift,kperryua/swift,Jnosh/swift,xedin/swift,shahmishal/swift,JaSpa/swift,uasys/swift,practicalswift/swift,manavgabhawala/swift,gregomni/swift,shahmishal/swift,codestergit/swift,deyton/swift,gottesmm/swift,kperryua/swift,OscarSwanros/swift,ben-ng/swift,hughbe/swift,atrick/swift,calebd/swift,gottesmm/swift,jmgc/swift,calebd/swift,danielmartin/swift,zisko/swift,stephentyrone/swift,CodaFi/swift,austinzheng/swift,calebd/swift,djwbrown/swift,shajrawi/swift,IngmarStein/swift,nathawes/swift,CodaFi/swift,tkremenek/swift,felix91gr/swift,Jnosh/swift,ken0nek/swift,harlanhaskins/swift,tkremenek/swift,calebd/swift,ben-ng/swift,karwa/swift,IngmarStein/swift,airspeedswift/swift,roambotics/swift,xedin/swift,xedin/swift,glessard/swift,OscarSwanros/swift,allevato/swift,kperryua/swift,benlangmuir/swift,gribozavr/swift,gribozavr/swift,jmgc/swift,kperryua/swift,OscarSwanros/swift,shahmishal/swift,apple/swift,huonw/swift,frootloops/swift,gmilos/swift,russbishop/swift,zisko/swift,brentdax/swift,Jnosh/swift,sschiau/swift,glessard/swift,huonw/swift,shajrawi/swift,gribozavr/swift,hughbe/swift,xwu/swift,frootloops/swift,parkera/swift,parkera/swift,tardieu/swift,tinysun212/swift-windows,ben-ng/swift,Jnosh/swift,airspeedswift/swift,CodaFi/swift,manavgabhawala/swift,amraboelela/swift,uasys/swift,aschwaighofer/swift,amraboelela/swift,djwbrown/swift,ahoppen/swift,tinysun212/swift-windows,hooman/swift,tardieu/swift,russbishop/swift,gottesmm/swift,gregomni/swift,manavgabhawala/swift,devincoughlin/swift,devincoughlin/swift,djwbrown/swift,karwa/swift,gribozavr/swift,airspeedswift/swift,milseman/swift,benlangmuir/swift,rudkx/swift,bitjammer/swift,natecook1000/swift,djwbrown/swift,IngmarStein/swift,gmilos/swift,JGiola/swift,austinzheng/swift,milseman/swift,Jnosh/swift,danielmartin/swift,swiftix/swift,danielmartin/swift,kstaring/swift,gribozavr/swift,zisko/swift,return/swift,felix91gr/swift,amraboelela/swift,tjw/swift,aschwaighofer/swift,sschiau/swift,gribozavr/swift,apple/swift,natecook1000/swift,bitjammer/swift,therealbnut/swift,hooman/swift,kstaring/swift,shahmishal/swift,atrick/swift,gmilos/swift,russbishop/swift,practicalswift/swift,roambotics/swift,gmilos/swift,jtbandes/swift,swiftix/swift,amraboelela/swift,apple/swift,practicalswift/swift,atrick/swift,stephentyrone/swift,sschiau/swift,frootloops/swift,return/swift,brentdax/swift,austinzheng/swift,modocache/swift,nathawes/swift,xwu/swift,arvedviehweger/swift,sschiau/swift,tinysun212/swift-windows,JGiola/swift,kstaring/swift,xwu/swift,return/swift,return/swift,austinzheng/swift,deyton/swift,therealbnut/swift,gribozavr/swift,natecook1000/swift,hughbe/swift,shajrawi/swift,johnno1962d/swift,hughbe/swift,devincoughlin/swift,manavgabhawala/swift,xedin/swift,tjw/swift,kperryua/swift,dreamsxin/swift,alblue/swift,natecook1000/swift,austinzheng/swift,glessard/swift,aschwaighofer/swift,jopamer/swift,deyton/swift,gmilos/swift,JaSpa/swift,allevato/swift,danielmartin/swift,parkera/swift,frootloops/swift,allevato/swift,gottesmm/swift,OscarSwanros/swift,sschiau/swift,milseman/swift,karwa/swift,kperryua/swift,xedin/swift,harlanhaskins/swift,return/swift,alblue/swift,ahoppen/swift,kstaring/swift,brentdax/swift,jckarter/swift,arvedviehweger/swift,austinzheng/swift,devincoughlin/swift,karwa/swift,ahoppen/swift,lorentey/swift,nathawes/swift,stephentyrone/swift,gottesmm/swift,tinysun212/swift-windows,stephentyrone/swift,apple/swift,xwu/swift,glessard/swift,harlanhaskins/swift,hughbe/swift,harlanhaskins/swift