Update build-ssp.container.yaml

Author: pmeulen

.github/workflows/build-ssp.container.yaml

@@ -49,4 +49,4 @@ jobs:
             ghcr.io/openconext/openconext-devssp/devssp:latest
             ghcr.io/openconext/openconext-devssp/devssp:${{ github.sha }}
             org.opencontainers.image.created: ${{ github.event.created_at }}
-            org.opencontainers.image.version: ${{ version.version }}
+            org.opencontainers.image.version: ${{ version.output.version }}