fix: fix incorrect JSON encoding in ScrollBadgePowerRank example

src/badge/examples/ScrollBadgePowerRank.sol

@@ -82,7 +82,7 @@ contract ScrollBadgePowerRank is
         string memory description = "Scroll Power Rank Badge";
         string memory image = ""; // IPFS, HTTP, or data URL
         string memory tokenUriJson = Base64.encode(
-            abi.encodePacked('{"name":"', name, '", "description":"', description, ', "image": "', image, '"}')
+            abi.encodePacked('{"name":"', name, '", "description":"', description, '", "image": "', image, '"}')
         );
         return string(abi.encodePacked("data:application/json;base64,", tokenUriJson));
     }