Upgrade Release Drafter Action to v6 (#74)

Author: StephenOman

.github/workflows/release-drafter.yml

@@ -8,6 +8,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Draft release notes
-        uses: release-drafter/release-drafter@v5
+        uses: release-drafter/release-drafter@v6
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}