Bump docker/setup-buildx-action in the github-actions group

Bumps the github-actions group with 1 update: [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action).


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)

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

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

.github/workflows/release-main.yml

@@ -47,7 +47,7 @@ jobs:
       run: dotnet nuget push 'build/output/_packages/*.nupkg' -k ${{secrets.GITHUB_TOKEN}} -s https://nuget.pkg.github.com/elastic/index.json --skip-duplicate --no-symbols
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@6524bf65af31da8d45b59e8c27de4bd072b392f5 # v3.8.0
+      uses: docker/setup-buildx-action@f7ce87c1d6bead3e36075b2ce75da1f6cc28aaca # v3.9.0
 
     - name: Log in to the Elastic Container registry
       uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
       run: .ci/deploy.sh ${{ secrets.NUGET_API_KEY }} ${{ secrets.NUGET_API_URL }}
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@6524bf65af31da8d45b59e8c27de4bd072b392f5 # v3.8.0
+      uses: docker/setup-buildx-action@f7ce87c1d6bead3e36075b2ce75da1f6cc28aaca # v3.9.0
 
     - name: Log in to the Elastic Container registry
       uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0