Bump the actions group across 1 directory with 2 updates

Bumps the actions group with 2 updates in the /.github/workflows directory: [OpenAstronomy/github-actions-workflows](https://github.com/openastronomy/github-actions-workflows) and [stefanzweifel/git-auto-commit-action](https://github.com/stefanzweifel/git-auto-commit-action).


Updates `OpenAstronomy/github-actions-workflows` from 1.13.0 to 1.16.0
- [Release notes](https://github.com/openastronomy/github-actions-workflows/releases)
- [Commits](OpenAstronomy/github-actions-workflows@9244411...8c0fde6)

Updates `stefanzweifel/git-auto-commit-action` from 5.0.1 to 5.1.0
- [Release notes](https://github.com/stefanzweifel/git-auto-commit-action/releases)
- [Changelog](https://github.com/stefanzweifel/git-auto-commit-action/blob/master/CHANGELOG.md)
- [Commits](stefanzweifel/git-auto-commit-action@8621497...e348103)

---
updated-dependencies:
- dependency-name: OpenAstronomy/github-actions-workflows
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
- dependency-name: stefanzweifel/git-auto-commit-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -11,7 +11,7 @@ concurrency:
 
 jobs:
   tests:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@8c0fde6f7e926df6ed7057255d29afa9c1ad5320  # v1.16.0
     with:
       posargs: --openmp-expected=True
       coverage: codecov
@@ -53,7 +53,7 @@ jobs:
 
   publish:
     needs: tests
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@8c0fde6f7e926df6ed7057255d29afa9c1ad5320  # v1.16.0
     with:
       test_extras: test
       test_command: pytest --pyargs extension_helpers

.github/workflows/update-changelog.yml

@@ -26,7 +26,7 @@ jobs:
           path-to-changelog: CHANGES.md
 
       - name: Commit updated CHANGELOG
-        uses: stefanzweifel/git-auto-commit-action@8621497c8c39c72f3e2a999a26b4ca1b5058a842  # v5.0.1
+        uses: stefanzweifel/git-auto-commit-action@e348103e9026cc0eee72ae06630dbe30c8bf7a79  # v5.1.0
         with:
           branch: main
           commit_message: Update CHANGELOG