Bump the ci-dependencies group across 1 directory with 2 updates

Bumps the ci-dependencies group with 2 updates in the / directory: [actions/checkout](https://github.com/actions/checkout) and [withastro/action](https://github.com/withastro/action).


Updates `actions/checkout` from 4.1.7 to 4.2.0
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@692973e...d632683)

Updates `withastro/action` from 2.0.1 to 3.0.0
- [Release notes](https://github.com/withastro/action/releases)
- [Commits](withastro/action@877fd7e...44cbafd)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci-dependencies
- dependency-name: withastro/action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci-dependencies
...

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

.github/workflows/site-deploy.yaml

@@ -11,12 +11,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: "Checkout repository"
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
         with:
           fetch-depth: 0
 
       - name: "Install, build, and upload your site"
-        uses: withastro/action@877fd7e5cf5dc5d213f6701c790972aa25452ad3 # v2.0.1
+        uses: withastro/action@44cbafd43567733e3b007918c6e0711480560516 # v3.0.0
 
   deploy:
     if: ${{ github.ref == 'refs/heads/main' }}