Bump withastro/action from 3.0.2 to 4.0.0 in the ci-dependencies group (#40)

Bumps the ci-dependencies group with 1 update: [withastro/action](https://github.com/withastro/action).


Updates `withastro/action` from 3.0.2 to 4.0.0
- [Release notes](https://github.com/withastro/action/releases)
- [Commits](withastro/action@56781b9...063f85a)

---
updated-dependencies:
- dependency-name: withastro/action
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/site-deploy.yaml

@@ -16,7 +16,7 @@ jobs:
           fetch-depth: 0
 
       - name: "Install, build, and upload your site"
-        uses: withastro/action@56781b97402ce0487b7e61ce2cb960c0e2cc5289 # v3.0.2
+        uses: withastro/action@063f85a3c9fc861a0a5e5a956225d9031177eff9 # v4.0.0
 
   deploy:
     if: ${{ github.ref == 'refs/heads/main' }}