release action: only execute the body extraction on successful merge (#…

…351)

* fix publish process

* extract correct changelog output

* update to 3.8.0

* try to get changes from commit message

* only exec on merge

.github/workflows/test-and-release.yml

@@ -101,6 +101,7 @@ jobs:
           npm publish
 
       - name: Extract the version and commit body from the tag
+        if: steps.automerge.outputs.mergeResult == 'merged'
         id: extract_release
         # The body may be multiline, therefore we need to escape some characters
         run: |