Bump the actions group across 1 directory with 3 updates

Bumps the actions group with 3 updates in the /.github/workflows directory: [OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml](https://github.com/openastronomy/github-actions-workflows), [OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml](https://github.com/openastronomy/github-actions-workflows) and [actions/checkout](https://github.com/actions/checkout).


Updates `OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml` from 2.2.2 to 2.3.0
- [Release notes](https://github.com/openastronomy/github-actions-workflows/releases)
- [Commits](OpenAstronomy/github-actions-workflows@930ac90...d9b81a0)

Updates `OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml` from 2.2.2 to 2.3.0
- [Release notes](https://github.com/openastronomy/github-actions-workflows/releases)
- [Commits](OpenAstronomy/github-actions-workflows@930ac90...d9b81a0)

Updates `actions/checkout` from 5.0.0 to 6.0.0
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@08c6903...1af3b93)

---
updated-dependencies:
- dependency-name: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
- dependency-name: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -11,7 +11,7 @@ concurrency:
 
 jobs:
   tests:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@930ac90540ecc5f43ba6d3d176efd25cd5f3c6c2  # v2.2.2
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@d9b81a07e789d1b1921ab5fe33de2ddcbbd02c3f  # v2.3.0
     with:
       posargs: --openmp-expected=True
       coverage: codecov
@@ -44,7 +44,7 @@ jobs:
 
   publish:
     needs: tests
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@930ac90540ecc5f43ba6d3d176efd25cd5f3c6c2  # v2.2.2
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@d9b81a07e789d1b1921ab5fe33de2ddcbbd02c3f  # v2.3.0
     with:
       test_extras: test
       test_command: pytest --pyargs extension_helpers

.github/workflows/update-changelog.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5.0.0
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3  # v6.0.0
         with:
           ref: main