Bump tailscale/github-action from 2 to 4

Bumps [tailscale/github-action](https://github.com/tailscale/github-action) from 2 to 4.
- [Release notes](https://github.com/tailscale/github-action/releases)
- [Commits](https://github.com/tailscale/github-action/compare/v2...v4)

---
updated-dependencies:
- dependency-name: tailscale/github-action
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build-and-deploy.yml

@@ -50,7 +50,7 @@ jobs:
           cache-to: type=gha,mode=max
 
       - name: Connect to Tailscale
-        uses: tailscale/github-action@v2
+        uses: tailscale/github-action@v4
         with:
           oauth-client-id: ${{ secrets.TAILSCALE_CLIENT_ID }}
           oauth-secret: ${{ secrets.TAILSCALE_CLIENT_SECRET }}