Add new category to release drafter

Author: gabro

.github/release-drafter.yml

@@ -4,6 +4,9 @@ template: |
   $CHANGES
 
 categories:
+  - title: "🐞 Bug fixes"
+    labels:
+      - "bug"
   - title: "🔧 Dependency updates"
     labels:
       - "dependencies"