Fix a typo in the GSettings docs
Fix a typo in the GSettings docs

Pointed out by Thomas Andersen
https://bugzilla.gnome.org/show_bug.cgi?id=647600

pstglia/external-bluetooth-glib,ieei/glib,tamaskenez/glib,johne53/MB3Glib,pstglia/platform-external-bluetooth-glib,antono/glib,pstglia/platform-external-bluetooth-glib,ieei/glib,zsx/glib,endlessm/glib,gale320/glib,bluez-android/glib,justinkb/aosp-bluez.glib,mzabaluev/glib,pstglia/external-bluetooth-glib,gale320/glib,cention-sany/glib,krichter722/glib,cosimoc/glib,antono/glib,johne53/MB3Glib,ieei/glib,endlessm/glib,Distrotech/glib,pstglia/external-bluetooth-glib,mzabaluev/glib,01org/android-bluez-glib,lukasz-skalski/glib,pstglia/platform-external-bluetooth-glib,tamaskenez/glib,bluez-android/glib,Distrotech/glib,djdeath/glib,endlessm/glib,tamaskenez/glib,gale320/glib,cosimoc/glib,lukasz-skalski/glib,01org/android-bluez-glib,lukasz-skalski/glib,cosimoc/glib,cention-sany/glib,MathieuDuponchelle/glib,justinkb/aosp-bluez.glib,MathieuDuponchelle/glib,ieei/glib,pstglia/external-bluetooth-glib,antono/glib,cention-sany/glib,djdeath/glib,krichter722/glib,johne53/MB3Glib,zsx/glib,MathieuDuponchelle/glib,darren-clark/android_platform_external_bluetooth_glib,tchakabam/glib,01org/android-bluez-glib,pstglia/platform-external-bluetooth-glib,Distrotech/glib,johne53/MB3Glib,01org/android-bluez-glib,tchakabam/glib,mzabaluev/glib,endlessm/glib,pstglia/external-bluetooth-glib,djdeath/glib,pstglia/platform-external-bluetooth-glib,mzabaluev/glib,gale320/glib,darren-clark/android_platform_external_bluetooth_glib,MathieuDuponchelle/glib,tamaskenez/glib,justinkb/aosp-bluez.glib,bluez-android/glib,johne53/MB3Glib,Distrotech/glib,djdeath/glib,cention-sany/glib,tamaskenez/glib,iConsole/Console-OS_external_bluetooth_glib,iConsole/Console-OS_external_bluetooth_glib,zsx/glib,MathieuDuponchelle/glib,justinkb/aosp-bluez.glib,tchakabam/glib,iConsole/Console-OS_external_bluetooth_glib,bluez-android/glib,iConsole/Console-OS_external_bluetooth_glib,mzabaluev/glib,01org/android-bluez-glib,Distrotech/glib,cosimoc/glib,ieei/glib,lukasz-skalski/glib,djdeath/glib,bluez-android/glib,gale320/glib,zsx/glib,darren-clark/android_platform_external_bluetooth_glib,krichter722/glib,iConsole/Console-OS_external_bluetooth_glib,lukasz-skalski/glib,tchakabam/glib,tchakabam/glib,cention-sany/glib,johne53/MB3Glib,krichter722/glib,antono/glib,darren-clark/android_platform_external_bluetooth_glib,cosimoc/glib,endlessm/glib,darren-clark/android_platform_external_bluetooth_glib,krichter722/glib,justinkb/aosp-bluez.glib