docs: clarify behavior of dependency injection at root injector (#28753)
docs: clarify behavior of dependency injection at root injector (#28753)

PR Close #28753

wKoza/angular,angular/angular,brandonroberts/angular,vikerman/angular,gdi2290/angular,manekinekko/angular,manekinekko/angular,angular-indonesia/angular,sarunint/angular,alexeagle/angular,hansl/angular,hansl/angular,alxhub/angular,brandonroberts/angular,blesh/angular,mhevery/angular,blesh/angular,Toxicable/angular,StephenFluin/angular,ocombe/angular,ocombe/angular,Brocco/angular,gdi2290/angular,sarunint/angular,mprobst/angular,JiaLiPassion/angular,alexeagle/angular,angular/angular,alxhub/angular,manekinekko/angular,mlaval/angular,angular-indonesia/angular,filipesilva/angular,manekinekko/angular,blesh/angular,Toxicable/angular,mhevery/angular,matsko/angular,jasonaden/angular,juristr/angular,Brocco/angular,snaptech/angular,gdi2290/angular,gdi2290/angular,shairez/angular,blesh/angular,petebacondarwin/angular,juristr/angular,gkalpak/angular,petebacondarwin/angular,jasonaden/angular,hansl/angular,wKoza/angular,hansl/angular,sarunint/angular,IgorMinar/angular,mprobst/angular,ocombe/angular,brandonroberts/angular,mgechev/angular,juristr/angular,juristr/angular,ocombe/angular,manekinekko/angular,matsko/angular,mgechev/angular,snaptech/angular,IgorMinar/angular,StephenFluin/angular,shairez/angular,wKoza/angular,gdi2290/angular,StephenFluin/angular,Toxicable/angular,alexeagle/angular,hansl/angular,snaptech/angular,gnomeontherun/angular,petebacondarwin/angular,IgorMinar/angular,Toxicable/angular,gkalpak/angular,angular/angular,IdeaBlade/angular,vikerman/angular,IdeaBlade/angular,sarunint/angular,alexeagle/angular,IdeaBlade/angular,sarunint/angular,vikerman/angular,gnomeontherun/angular,jasonaden/angular,brandonroberts/angular,mlaval/angular,StephenFluin/angular,alxhub/angular,ocombe/angular,jasonaden/angular,sarunint/angular,gkalpak/angular,shairez/angular,alxhub/angular,matsko/angular,StephenFluin/angular,petebacondarwin/angular,filipesilva/angular,hansl/angular,mhevery/angular,juristr/angular,vikerman/angular,IdeaBlade/angular,petebacondarwin/angular,petebacondarwin/angular,mhevery/angular,filipesilva/angular,brandonroberts/angular,blesh/angular,snaptech/angular,JiaLiPassion/angular,JiaLiPassion/angular,angular-indonesia/angular,gnomeontherun/angular,mhevery/angular,Brocco/angular,vikerman/angular,juristr/angular,mgechev/angular,wKoza/angular,Toxicable/angular,alexeagle/angular,mprobst/angular,angular/angular,Brocco/angular,IdeaBlade/angular,mhevery/angular,mlaval/angular,Brocco/angular,mprobst/angular,shairez/angular,mlaval/angular,ocombe/angular,Brocco/angular,mlaval/angular,brandonroberts/angular,mgechev/angular,gkalpak/angular,matsko/angular,mprobst/angular,wKoza/angular,mprobst/angular,filipesilva/angular,snaptech/angular,IgorMinar/angular,matsko/angular,jasonaden/angular,IgorMinar/angular,IgorMinar/angular,alexeagle/angular,angular-indonesia/angular,JiaLiPassion/angular,filipesilva/angular,mgechev/angular,manekinekko/angular,Toxicable/angular,wKoza/angular,snaptech/angular,gnomeontherun/angular,shairez/angular,gdi2290/angular,alxhub/angular,jasonaden/angular,vikerman/angular