docs: add `latest-versions.ts` bump to minor/major version release instructions
docs: add `latest-versions.ts` bump to minor/major version release instructions

In v13.1, we forgot to increment this value and caused an error for early adopters of `13.1.0`. CI should catch this mistake now, and these docs will serve as a reminder to bump the value before release.

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