added checkbox for copying release notes to GH to correct workflow

Author: I750911

.github/workflows/prepare-release.yaml

@@ -148,6 +148,7 @@ jobs:
           - [ ] Review the changes in [the release commit]($COMMIT_URL)
           - [ ] Review the [Draft Release](${{ needs.create-release.outputs.release-url }})
           - [ ] Review **and approve** this PR
+          - [ ] For release: corresponding [release notes](https://github.com/SAP/ai-sdk-java/blob/main/docs/release-notes/release-notes-0-to-14.md) copied to [GitHub Releases](https://github.com/SAP/ai-sdk-java/releases)  
           - [ ] Trigger the [Perform Release Workflow](${{ github.event.repository.html_url }}/actions/workflows/perform-release.yaml)
           - [ ] Once the `Perform Release` workflow is through, head over to the [Central Sonatype](https://central.sonatype.com/publishing/deployments) and log in with the credentials in the Team Password Safe. There should be a published release.")
           echo "PR_URL=$PR_URL" >> $GITHUB_OUTPUT