fix: var access in release action

Author: lakhansamani

.github/workflows/release.yaml

@@ -71,4 +71,4 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           build-args: |
-            VERSION=${{ steps.meta.outputs.labels["org.opencontainers.image.version"] }}
+            VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}