add some magic to merge to parent branch

This commit make it merge to parent branch instead of `master` branch, i.e. you are working on a branch called `refactor` and making a branch `release/2.0`, changes will be applied to `refactor` instead of `master`.

.github/workflows/release.yml

@@ -94,7 +94,13 @@ jobs:
 
       - name: Merge branch and push
         run: |
-              git checkout master
+              parent=$(git show-branch \
+                      | grep -F '*' \
+                      | grep -v "$(git rev-parse --abbrev-ref HEAD)" \
+                      | head -n1 \
+                      | sed 's/.*\[\(.*\)\].*/\1/' \
+                      | sed 's/[\^~].*//')
+              git checkout ${parent}
               git merge release/${{ env.BUILDVER }} --allow-unrelated-histories
               git pull && git push && git push --tags