fix badge image

Author: zhongkechen

.github/workflows/update-milestone-badge.yml

@@ -34,8 +34,8 @@ jobs:
           if [ -z "$TITLE" ]; then
             URL="https://img.shields.io/badge/Roadmap-No%20milestone-lightgrey"
           else
-            # URL-encode the title using jq
-            ENCODED=$(echo -n "$TITLE" | jq -sRr @uri)
+            # URL-encode the title using jq, then escape dashes for shields.io
+            ENCODED=$(echo -n "$TITLE" | jq -sRr @uri | sed 's/-/--/g')
             URL="https://img.shields.io/badge/Roadmap-${ENCODED}-blue"
           fi