ci: add `aio/content/examples/*` to `docs-infra` group (#30087)
ci: add `aio/content/examples/*` to `docs-infra` group (#30087)

This directory contains some top-level files (`.gitignore`,
`tsconfig.json`, `tslint.json`) that are related to the examples
infrastructure (building, linting, etc.).

They had previously no owner; now they are owned by the `docs-infra`
group.

PR Close #30087

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