fix: fix shared workflow bug

Author: wislertt

.github/workflows/shared-check-pr-labels-with-prefix.yml

@@ -37,7 +37,7 @@ jobs:
                   echo "Input labels: $LABELS_JSON"
 
                   # Use jq to filter labels by prefix (empty prefix returns all labels)
-                  JSON_RESULT=$(echo '$LABELS_JSON' | \
+                  JSON_RESULT=$(echo "$LABELS_JSON" | \
                     jq --arg prefix "$PREFIX" \
                     'map(select(.name | startswith($prefix))) |
                      map({(.name): .}) |