Add replacer for github actions bot

Author: lukasmasuch

.github/release-drafter.yml

@@ -34,6 +34,9 @@ categories:
 exclude-labels:
   - "skip changelog"
 change-template: "- $TITLE (#$NUMBER) by @$AUTHOR"
+replacers:
+  - search: '/(?:and )?@github-actions(?:\[bot\])?,?/g'
+    replace: ""
 template: |
   $CHANGES