chore(deps): bump tailscale/github-action from 2 to 3

Bumps [tailscale/github-action](https://github.com/tailscale/github-action) from 2 to 3.
- [Release notes](https://github.com/tailscale/github-action/releases)
- [Commits](tailscale/github-action@v2...v3)

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

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

.github/workflows/validate.yml

@@ -30,7 +30,7 @@ jobs:
       - name: check
         run: echo "${{ steps.changes.outputs.NOMAD_FILES_CHANGED }}"
       - name: Setup Tailscale
-        uses: tailscale/github-action@v2
+        uses: tailscale/github-action@v3
         with:
           oauth-client-id: ${{ secrets.TAILSCALE_OAUTH_CLIENT_ID }}
           oauth-secret: ${{ secrets.TAILSCALE_OAUTH_KEY }}