Hotfix feature.json (#2865)

- Stray comma at the end of line 324.
- Since JSON handling is different between Powershell 5 and Powershell 7. You only notice the error during Compiling on Powershell 5. Fixes #2864

config/feature.json

@@ -321,5 +321,5 @@
     "Order": "a084_",
     "Type": "Button",
     "ButtonWidth": "300"
-  },
+  }
 }