docs(aio): correct abbreviation (#16295)
docs(aio): correct abbreviation (#16295)

change abbreviation from 'ES' to 'ES2015'. the 'ES2015' abbreviation is used elsewhere in the tutorial.
LucasSloan/angular,blesh/angular,pkozlowski-opensource/angular,gdi2290/angular,kara/angular,chuckjaz/angular,smartm0use/angular,robwormald/angular,manekinekko/angular,hansl/angular,rkirov/angular,vikerman/angular,filipesilva/angular,alexeagle/angular,jonrimmer/angular,souvikbasu/angular,jasonaden/angular,kwalrath/angular,ghetolay/angular,IgorMinar/angular,ValtoFrameworks/Angular-2,cexbrayat/angular,NathanWalker/angular,dtoroshin/n2oDoc,blesh/angular,hansl/angular,rkirov/angular,alxhub/angular,ValtoFrameworks/Angular-2,cexbrayat/angular,dsebastien/angular,LucasSloan/angular,mdegoo/angular,pk-karthik/framework-js-angular,meeroslav/angular,ocombe/angular,gkalpak/angular,Toxicable/angular,ghetolay/angular,rjamet/angular,StephenFluin/angular,dsebastien/angular,ultrasonicsoft/angular,robwormald/angular,snaptech/angular,heathkit/angular,kwalrath/angular,manekinekko/angular,mhevery/angular,shairez/angular,mlaval/angular,mdegoo/angular,dtoroshin/n2oDoc,meeroslav/angular,trshafer/angular,ultrasonicsoft/angular,chuckjaz/angular,vamsivarikuti/angular,vicb/angular,angular/angular,gjungb/angular,nosovk/angular,IdeaBlade/angular,pk-karthik/framework-js-angular,mgiambalvo/angular,juristr/angular,Brocco/angular,cironunes/angular,NathanWalker/angular,juristr/angular,kara/angular,gnomeontherun/angular,brandonroberts/angular,wKoza/angular,kegluneq/angular,IgorMinar/angular,Toxicable/angular,mgiambalvo/angular,manekinekko/angular,brandonroberts/angular,vsavkin/angular,NathanWalker/angular,hansl/angular,vikerman/angular,rkirov/angular,aboveyou00/angular,blesh/angular,trshafer/angular,shairez/angular,cironunes/angular,juleskremer/angular,cexbrayat/angular,rkirov/angular,mhevery/angular,alexeagle/angular,chalin/angular,gnomeontherun/angular,chuckjaz/angular,smartm0use/angular,angular-indonesia/angular,angular/angular,kegluneq/angular,cironunes/angular,mdegoo/angular,vamsivarikuti/angular,sarunint/angular,shairez/angular,juristr/angular,gdi2290/angular,aboveyou00/angular,rjamet/angular,dtoroshin/n2oDoc,juristr/angular,chuckjaz/angular,mzgol/angular,angularbrasil/angular,hansl/angular,mlaval/angular,jonrimmer/angular,filipesilva/angular,mprobst/angular,snaptech/angular,mhevery/angular,heathkit/angular,trshafer/angular,snaptech/angular,vicb/angular,alexeagle/angular,pk-karthik/framework-js-angular,pkozlowski-opensource/angular,diestrin/angular,LucasSloan/angular,gdi2290/angular,mgiambalvo/angular,shairez/angular,kara/angular,Toxicable/angular,ValtoFrameworks/Angular-2,aboveyou00/angular,robwormald/angular,petebacondarwin/angular,mgechev/angular,souvikbasu/angular,rkirov/angular,tbosch/angular,alxhub/angular,wKoza/angular,wKoza/angular,mzgol/angular,jonrimmer/angular,vikerman/angular,snaptech/angular,gjungb/angular,IgorMinar/angular,mlaval/angular,blesh/angular,rjamet/angular,wKoza/angular,tbosch/angular,jasonaden/angular,angular-indonesia/angular,kwalrath/angular,juleskremer/angular,juleskremer/angular,chuckjaz/angular,angular/angular,aboveyou00/angular,trshafer/angular,mzgol/angular,sarunint/angular,angular-indonesia/angular,StephenFluin/angular,manekinekko/angular,blesh/angular,NathanWalker/angular,rjamet/angular,Brocco/angular,mgol/angular,trshafer/angular,gjungb/angular,vsavkin/angular,shairez/angular,rkirov/angular,pk-karthik/framework-js-angular,petebacondarwin/angular,angularbrasil/angular,IgorMinar/angular,vsavkin/angular,diestrin/angular,gnomeontherun/angular,jasonaden/angular,alexeagle/angular,vicb/angular,dsebastien/angular,IdeaBlade/angular,ValtoFrameworks/Angular-2,chalin/angular,nosovk/angular,vamsivarikuti/angular,mgiambalvo/angular,kegluneq/angular,souvikbasu/angular,manekinekko/angular,wKoza/angular,mhevery/angular,petebacondarwin/angular,vsavkin/angular,gjungb/angular,vsavkin/angular,matsko/angular,mgechev/angular,vicb/angular,ultrasonicsoft/angular,mlaval/angular,chalin/angular,jasonaden/angular,IdeaBlade/angular,mgechev/angular,mzgol/angular,Brocco/angular,mgol/angular,ghetolay/angular,juleskremer/angular,LucasSloan/angular,gdi2290/angular,aboveyou00/angular,gdi2290/angular,ocombe/angular,brandonroberts/angular,Brocco/angular,sarunint/angular,JiaLiPassion/angular,pkozlowski-opensource/angular,mzgol/angular,vicb/angular,dtoroshin/n2oDoc,tbosch/angular,sarunint/angular,cexbrayat/angular,Toxicable/angular,kegluneq/angular,ultrasonicsoft/angular,vicb/angular,robwormald/angular,vikerman/angular,juleskremer/angular,mlaval/angular,cironunes/angular,gkalpak/angular,kwalrath/angular,brandonroberts/angular,kegluneq/angular,brandonroberts/angular,JiaLiPassion/angular,mgol/angular,meeroslav/angular,smartm0use/angular,StephenFluin/angular,gkalpak/angular,mgol/angular,heathkit/angular,gdi2290/angular,cironunes/angular,ultrasonicsoft/angular,tbosch/angular,heathkit/angular,mgechev/angular,mgol/angular,ValtoFrameworks/Angular-2,petebacondarwin/angular,hansl/angular,JiaLiPassion/angular,pkozlowski-opensource/angular,IgorMinar/angular,angularbrasil/angular,mhevery/angular,dsebastien/angular,IdeaBlade/angular,petebacondarwin/angular,robwormald/angular,dtoroshin/n2oDoc,matsko/angular,NathanWalker/angular,gjungb/angular,alexeagle/angular,angularbrasil/angular,matsko/angular,dsebastien/angular,mdegoo/angular,filipesilva/angular,filipesilva/angular,juristr/angular,ocombe/angular,mzgol/angular,sarunint/angular,IgorMinar/angular,pk-karthik/framework-js-angular,manekinekko/angular,mdegoo/angular,petebacondarwin/angular,ocombe/angular,mprobst/angular,mgechev/angular,ghetolay/angular,mgiambalvo/angular,StephenFluin/angular,cironunes/angular,pkozlowski-opensource/angular,alxhub/angular,jasonaden/angular,chuckjaz/angular,nosovk/angular,ultrasonicsoft/angular,NathanWalker/angular,mgol/angular,angularbrasil/angular,tbosch/angular,Toxicable/angular,mdegoo/angular,kara/angular,matsko/angular,mprobst/angular,Brocco/angular,ocombe/angular,jonrimmer/angular,kara/angular,nosovk/angular,heathkit/angular,smartm0use/angular,juristr/angular,ghetolay/angular,vikerman/angular,dsebastien/angular,wKoza/angular,snaptech/angular,Toxicable/angular,souvikbasu/angular,JiaLiPassion/angular,angular-indonesia/angular,souvikbasu/angular,alexeagle/angular,diestrin/angular,heathkit/angular,meeroslav/angular,nosovk/angular,angularbrasil/angular,mprobst/angular,jonrimmer/angular,LucasSloan/angular,ocombe/angular,jasonaden/angular,kegluneq/angular,chalin/angular,gnomeontherun/angular,cexbrayat/angular,kara/angular,trshafer/angular,snaptech/angular,jonrimmer/angular,sarunint/angular,mprobst/angular,vamsivarikuti/angular,Brocco/angular,alxhub/angular,smartm0use/angular,kwalrath/angular,diestrin/angular,LucasSloan/angular,mprobst/angular,gkalpak/angular,aboveyou00/angular,mhevery/angular,StephenFluin/angular,robwormald/angular,IdeaBlade/angular,vamsivarikuti/angular,alxhub/angular,angular/angular,filipesilva/angular,hansl/angular,matsko/angular,brandonroberts/angular,meeroslav/angular,vikerman/angular