Bump actions/setup-python in /.github/actions/install-meltingpot

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5.0.0 to 5.1.0.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@0a5c615...82c7e63)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/actions/install-meltingpot/action.yml

@@ -26,7 +26,7 @@ runs:
 
     - name: Set up Python ${{ inputs.python-version }}
       id: setup-python
-      uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c
+      uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d
       with:
         python-version: ${{ inputs.python-version }}