chore(deps): bump docker/build-push-action from 5.1.0 to 6.1.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.1.0 to 6.1.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@4a13e50...31159d4)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build.yml

@@ -146,7 +146,7 @@ jobs:
             type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
 
       - name: Agent Plane Hashicorp Container Build and push
-        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
+        uses: docker/build-push-action@31159d49c0d4756269a0940a750801a1ea5d7003 # v6.1.0
         with:
           context: agent-plane/agentplane-hashicorp
           file: agent-plane/agentplane-hashicorp/src/main/docker/Dockerfile
@@ -184,7 +184,7 @@ jobs:
             type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
 
       - name: Agent Plane Azure Vault Container Build and push
-        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
+        uses: docker/build-push-action@31159d49c0d4756269a0940a750801a1ea5d7003 # v6.1.0
         with:
           context: agent-plane/agentplane-azure-vault/.
           file: agent-plane/agentplane-azure-vault/src/main/docker/Dockerfile