build(docs-infra): upgrade cli command docs sources to a57976b98 (#42943)
build(docs-infra): upgrade cli command docs sources to a57976b98 (#42943)

Updating [angular#master](https://github.com/angular/angular/tree/master) from
[cli-builds#master](https://github.com/angular/cli-builds/tree/master).

##
Relevant changes in
[commit range](https://github.com/angular/cli-builds/compare/18bbd044d...a57976b98):

**Modified**
- help/generate.json

PR Close #42943

JiaLiPassion/angular,gnomeontherun/angular,gnomeontherun/angular,JiaLiPassion/angular,gnomeontherun/angular,manekinekko/angular,manekinekko/angular,angular-indonesia/angular,angular/angular,angular/angular,angular/angular,angular-indonesia/angular,shairez/angular,ocombe/angular,JiaLiPassion/angular,brandonroberts/angular,brandonroberts/angular,shairez/angular,shairez/angular,gkalpak/angular,ocombe/angular,gnomeontherun/angular,manekinekko/angular,manekinekko/angular,JiaLiPassion/angular,manekinekko/angular,angular-indonesia/angular,ocombe/angular,ocombe/angular,shairez/angular,angular-indonesia/angular,gkalpak/angular,brandonroberts/angular,ocombe/angular,shairez/angular,gkalpak/angular,brandonroberts/angular,brandonroberts/angular,manekinekko/angular,brandonroberts/angular,ocombe/angular,angular/angular,gkalpak/angular