docs: add `rm -rf node_modules/` to release docs
docs: add `rm -rf node_modules/` to release docs

In the latest release, I was not able to build even after running `yarn` to refresh dependencies. Eventually, we tracked
the issue down to `rm -rf node_modules/`. There may be some instances where this can be necessary to ensure clean
builds.

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