Remove mdformat file exclusions

[fyliu]

Overview

Now that mdformat supports the markdown snippet syntax (updated in the changes for #464), we should remove our exclusion of the files that contain that syntax, so that all markdown files are auto-formatted by mdformat.

Action Items

• Remove pre-commit config lines that exclude the 2 files

Resources/Instructions

These are the lines to remove:

peopledepot/.pre-commit-config.yaml

Lines 141 to 145 in 96cd995

	exclude: |
	(?x)^(
	docs/index.md$|
	docs/license.md$
	)

[fyliu]

This issue has a PR waiting for review.