fix: release workflow should look at HEAD (#861)

Author: sphterry

.github/workflows/ipa-release.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Fetch Versions
       id: version_check
       env:   
-        BASE_BRANCH: ${{ github.ref_name }}
+        BASE_BRANCH: "HEAD~1"
       run: |
         version_changed=$(./.github/scripts/ipa_version_check.sh)  
         echo "Version changed? ${version_changed}"