chore(ci): Update release drafter config to exclude dependabot (#3511)

Exclude 'dependabot' from contributors in release drafter config.

Author: elena-kolevska

.github/release-drafter-config.yml

@@ -36,6 +36,8 @@ categories:
 change-template: '- $TITLE (#$NUMBER)'
 exclude-labels:
   - 'skip-changelog'
+exclude-contributors:
+  - 'dependabot'
 template: |
   # Changes