chore(deps): bump the github-actions-dependencies group with 2 updates

Bumps the github-actions-dependencies group with 2 updates: [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) and [zgosalvez/github-actions-ensure-sha-pinned-actions](https://github.com/zgosalvez/github-actions-ensure-sha-pinned-actions).


Updates `docker/setup-buildx-action` from 3.8.0 to 3.9.0
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@6524bf6...f7ce87c)

Updates `zgosalvez/github-actions-ensure-sha-pinned-actions` from 3.0.20 to 3.0.21
- [Release notes](https://github.com/zgosalvez/github-actions-ensure-sha-pinned-actions/releases)
- [Commits](zgosalvez/github-actions-ensure-sha-pinned-actions@c3a2b64...6eb1abd)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions-dependencies
- dependency-name: zgosalvez/github-actions-ensure-sha-pinned-actions
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions-dependencies
...

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

Author: dependabot[bot]

.github/workflows/docker-bake.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Set up Docker buildx
-        uses: docker/setup-buildx-action@6524bf65af31da8d45b59e8c27de4bd072b392f5 # v3.8.0
+        uses: docker/setup-buildx-action@f7ce87c1d6bead3e36075b2ce75da1f6cc28aaca # v3.9.0
       - name: Build
         uses: docker/bake-action@7bff531c65a5cda33e52e43950a795b91d450f63 # v6.3.0
         env:

.github/workflows/secure_workflows.yml

@@ -32,4 +32,4 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
       - name: Ensure 3rd party workflows have SHA pinned
-        uses: zgosalvez/github-actions-ensure-sha-pinned-actions@c3a2b64f69b7a1542a68f44d9edbd9ec3fc1455e # v3.0.20
+        uses: zgosalvez/github-actions-ensure-sha-pinned-actions@6eb1abde32fed00453b0d03497f4ba4fecba146d # v3.0.21