Bump the actions group in /.github/workflows with 2 updates

Bumps the actions group in /.github/workflows with 2 updates: [OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml](https://github.com/openastronomy/github-actions-workflows) and [OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml](https://github.com/openastronomy/github-actions-workflows).


Updates `OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml` from 2.6.2 to 2.6.3
- [Release notes](https://github.com/openastronomy/github-actions-workflows/releases)
- [Commits](OpenAstronomy/github-actions-workflows@e973440...2835f0c)

Updates `OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml` from 2.6.2 to 2.6.3
- [Release notes](https://github.com/openastronomy/github-actions-workflows/releases)
- [Commits](OpenAstronomy/github-actions-workflows@e973440...2835f0c)

---
updated-dependencies:
- dependency-name: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml
  dependency-version: 2.6.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
- dependency-name: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml
  dependency-version: 2.6.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/ci_workflows.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   tests:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@e97344095b099e1d729fe97429078c9975921d8a # v2.6.2
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@2835f0cacddf3f8de198db9afdb5354a5cebe0ef # v2.6.3
     with:
       envs: |
         - macos: py39-test-pytest50

.github/workflows/publish.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   publish:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@e97344095b099e1d729fe97429078c9975921d8a # v2.6.2
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@2835f0cacddf3f8de198db9afdb5354a5cebe0ef # v2.6.3
     if: ((github.event_name == 'push' && startsWith(github.ref, 'refs/tags')) || contains(github.event.pull_request.labels.*.name, 'Build wheels'))
     with:
       test_extras: test