Update Grunt instruction links and wording
Merge pull request #10011 from nschonni/patch-1

Update Grunt instruction links and wording
Use NPM version of grunt-html-validation

The package is now published, so the direct git url is no longer
required
Merge pull request #10034 from nschonni/use-published-version-for-grunt-html-validation

Use NPM version of grunt-html-validation
fix #10029