Update create-a-repo.md

[raspberri05]

Why:

Closes Issue #16950

What's being changed:

Added a sentence discussing community health files in the blue note box on this page: https://docs.github.com/en/get-started/quickstart/create-a-repo

Check off the following:

• I have reviewed my changes in staging (look for "Automatically generated comment" and click Modified to view your latest changes).
• For content changes, I have completed the self-review checklist.

Writer impact (This section is for GitHub staff members only):

• This pull request impacts the contribution experience
  • I have added the 'writer impact' label
  • I have added a description and/or a video demo of the changes below (e.g. a "before and after video")

[github-actions]

Automatically generated comment ℹ️

This comment is automatically generated and will be overwritten every time changes are committed to this branch.

The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
get-started/quickstart/create-a-repo.md	fpt ghec ghes@ 3.5 3.4 3.3 3.2 3.1 ghae	fpt ghec ghes@ 3.5 3.4 3.3 3.2 3.1 ghae

[janiceilene]

Thanks for opening a PR 👍 Please fill out the pull request template in the top comment in this pull request, then we'll get this up for review!

[raspberri05]

I went ahead and filled out the PR template. Please let me know if I should add anything else.

[mchammer01]

@vedant205 👋🏻 - thanks for your contibution ✨
I've made some suggestions that I'm going to apply before approving this PR.

[mchammer01]

LGTM 💖

[github-actions]

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