Update build_image.yml

Author: jacobbednarz

.github/workflows/build_image.yml

@@ -54,7 +54,7 @@ jobs:
       - name: Upload digest
         uses: actions/upload-artifact@v4
         with:
-          name: digest-$artifact_identifier
+          name: "digest-${artifact_identifier}"
           path: /tmp/digests/*
           if-no-files-found: error
           retention-days: 1