Update .github/workflows/release.yml

Author: xrmx

.github/workflows/release.yml

@@ -92,7 +92,7 @@ jobs:
           tags: |
             type=raw,value=latest,prefix=test-,enable={{is_default_branch}}
             type=semver,pattern={{version}}
-          labels:
+          labels: |
             org.opencontainers.image.vendor=Elastic
             org.opencontainers.image.title=elastic-otel-python-operator
             org.opencontainers.image.description=EDOT Python image for Kubernetes OpenTelemetry Operator