build(deps): update envoyproxy/toolshed requirement to actions-v0.2.35

Updates the requirements on [envoyproxy/toolshed](https://github.com/envoyproxy/toolshed) to permit the latest version.
- [Release notes](https://github.com/envoyproxy/toolshed/releases)
- [Commits](https://github.com/envoyproxy/toolshed/commits/actions-v0.2.35)

---
updated-dependencies:
- dependency-name: envoyproxy/toolshed
  dependency-type: direct:production
...

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

.github/workflows/envoy-sync.yml

@@ -61,12 +61,12 @@ jobs:
         downstream:
         - envoy-openssl
     steps:
-    - uses: envoyproxy/toolshed/gh-actions/[email protected].30
+    - uses: envoyproxy/toolshed/gh-actions/[email protected].35
       id: appauth
       with:
         app_id: ${{ secrets.ENVOY_CI_SYNC_APP_ID }}
         key: ${{ secrets.ENVOY_CI_SYNC_APP_KEY }}
-    - uses: envoyproxy/toolshed/gh-actions/[email protected].30
+    - uses: envoyproxy/toolshed/gh-actions/[email protected].35
       with:
         repository: "envoyproxy/${{ matrix.downstream }}"
         ref: release/v1.28