Drop commitish from release-drafter configuration

Author: slawekjaranowski

.github/workflows/release-drafter.yml

@@ -27,4 +27,3 @@ jobs:
     uses: apache/maven-gh-actions-shared/.github/workflows/release-drafter.yml@v4
     with:
       config-name: 'release-drafter-3.x.yml'
-      commitish: "maven-archiver-3.x"