docs: update the description of the lint command
docs: update the description of the lint command

Update the description of the lint command for when a project name is not provided.

Closes #21619

geofffilippi/angular-cli,clydin/angular-cli,Brocco/angular-cli,Brocco/angular-cli,geofffilippi/angular-cli,Brocco/angular-cli,catull/angular-cli,catull/angular-cli,geofffilippi/angular-cli,Brocco/angular-cli,Brocco/angular-cli,clydin/angular-cli,angular/angular-cli,angular/angular-cli,catull/angular-cli,geofffilippi/angular-cli,catull/angular-cli,angular/angular-cli,clydin/angular-cli,angular/angular-cli,clydin/angular-cli