Added note about robots.txt to checklist

[blipson89]

Description / Motivation

Added a note about updating the SXA Robots field before go live since Sitecore adds a "Disallow: *" by default. Therefore, if you do not explicitly set an allow, Google will not crawl the site.

Also fixed a few minor grammatical issues.

How Has This Been Tested?

I proof read it.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update (non-breaking change; modified files are limited to the /data directory or other markdown files)

Checklist:

• I have read the Contributing guide.
• My code/comments/docs fully adhere to the Code of Conduct.
• My change is a code change.
• My change is a documentation change and there are NO other updates required.
• My change has new or updated images which are stored in the /public/images folder that need to be migrated to Sitecore DAM

[vercel]

@blipson89 is attempting to deploy a commit to the Sitecore Technical Marketing Team on Vercel.

A member of the Team first needs to authorize it.