chore(deps): update tailscale/github-action action to v3

Author: renovate[bot]

.github/workflows/k8s.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: tailscale/github-action@v2
+      - uses: tailscale/github-action@84a3f23bb4d843bcf4da6cf824ec1be473daf4de # v3
         with:
           oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
           oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}