extract release notes with variable

Author: d-biehl

.github/workflows/build-test-package-publish.yml

@@ -275,7 +275,10 @@ jobs:
 
       - name: get release notes
         id: get_release_notes
-        run: echo "::set-output name=release_notes::$(poetry run npm run extract-release-notes)"
+        run: |
+          REL_NOTES="$(poetry run npm run extract-release-notes)"
+          echo $REL_NOTES
+          echo "::set-output name=release_notes::$REL_NOTES"
 
       - name: find assets
         id: find_assets