Fix PR message referencing issue

Author: thomaseizinger

.github/workflows/draft-new-release.yml

@@ -60,7 +60,7 @@ jobs:
           body: |
             Hi @${{ github.actor }}!
 
-            This PR was created in response to this release issue: #${{ github.event.issue.number }}.
+            This PR was created in response to a manual trigger of the release workflow here: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}.
             I've updated the changelog and bumped the versions in the manifest files in this commit: ${{ steps.make-commit.outputs.commit }}.
 
             Merging this PR will create a GitHub release and upload any assets that are created as part of the release build.