Adjusts pre-commit to work on Windows (#2958)

# Description and Motivation
<!--- bulleted, high level items. use keywords (eg "closes #144" or
"fixes #4323") -->

For Windows, it worked when i specified the `bash` command rather than
just using `./` to invoke the sh script

fixes #2954 

## Has this been tested? How?

working on my Windows VM and on my Mac. I did also add some entries to
the PATH environmental variables on windows, not sure if that was needed
to get this to work

## Screenshots (if appropriate)

<img width="734" alt="Screenshot 2024-03-05 at 9 22 31 AM"
src="https://github.com/SatcherInstitute/health-equity-tracker/assets/41567007/5fca3dfa-3615-40f7-9a44-b8ebcbc1cfc5">


## Types of changes

(leave all that apply)

- Bug fix

## New frontend preview link is below in the Netlify comment 😎


Co-authored-by: James Demlow <[email protected]>

.pre-commit-config.yaml

@@ -37,7 +37,7 @@ repos:
     hooks:
       - id: check-file-count
         name: 🗄️  check + warn if 100+ files in commit
-        entry: ./scripts/.util/warn_many_files_per_commit.sh
+        entry: bash -c scripts/.util/warn_many_files_per_commit.sh
         language: system
         types: [text]
         pass_filenames: false