gateway: bump actions/setup-python from 5.6.0 to 6.2.0 in /pelican

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5.6.0 to 6.2.0.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@a26af69...a309ff8)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: 6.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pelican/action.yml

@@ -62,7 +62,7 @@ runs:
     # PIP_BREAK_SYSTEM_PACKAGES, and gives the Pelican tool venv a known
     # Python version to build against.
     - name: Set up Python
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
       with:
         python-version: '3.12'