themes.json: update info for freeplay/firefox-onebar

Author: BeyondMagic

themes.json

@@ -1245,8 +1245,8 @@
     ],
     "repository": "https://git.gay/freeplay/Firefox-Onebar",
     "pushed_at": "2024-05-11T01:01:47Z",
-    "stargazers_count": -1,
-    "avatar": ""
+    "stargazers_count": 8,
+    "avatar": "https://git.gay/avatars/25ef717d14080c74d7a215792ff28c5ba2590585985036074bf9c0723fd9c582?size=512"
   },
   {
     "title": "Dracula",