fix runtime test for multiple container tags

Author: gilesknap

.github/workflows/code.yml

@@ -134,7 +134,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
 
       - name: Check runtime
-        run: for i in ${{ steps.meta.outputs.tags }}; do docker run ${i} --version; done
+        run: for i in "${{ steps.meta.outputs.tags }}" ; do docker run ${i} --version; done
 
       - name: Upload build files
         uses: actions/upload-artifact@v3