fix(ci): fix version number passed to docker build

Author: holysoles

.github/workflows/image_build.yaml

@@ -42,4 +42,4 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           build-args: |
-            "VERSION=${{ github.ref }}"
+            "VERSION=${{ github.event.release.tag_name }}"