Set title and description written in line-openapi PR again (#741)

same as line/line-bot-sdk-nodejs#1123

Author: Yang-33

.github/workflows/generated-code.yml

@@ -39,17 +39,7 @@ jobs:
       ## Run if diff exists and event is not pull request, and make PR
       - if: ${{ github.event_name != 'pull_request' && env.DIFF_IS_EMPTY != 'true' }}
         run: |
-          BRANCH_NAME="update-diff-${{ env.CURRENT_DATETIME }}"
-
-          git config user.name github-actions
-          git config user.email [email protected]
-          git checkout -b $BRANCH_NAME
-
-          git add .
-          git commit -m "Code are generated by openapi generator"
-
-          git push origin $BRANCH_NAME
-
+          # Determine Change Type via Submodule Script. This scripts read current uncommited changes.
           CHANGE_TYPE=$(npx zx ./line-openapi/tools/determine-change-type.mjs)
           echo "Determined change type: $CHANGE_TYPE"
 
@@ -66,6 +56,18 @@ jobs:
             BODY="⚠Reviewer: Please edit this description to include relevant information about the changes.⚠"
           fi
 
+          # Create PR
+          BRANCH_NAME="update-diff-${{ env.CURRENT_DATETIME }}"
+
+          git config user.name github-actions
+          git config user.email [email protected]
+          git checkout -b $BRANCH_NAME
+
+          git add .
+          git commit -m "Code are generated by openapi generator"
+
+          git push origin $BRANCH_NAME
+
           gh pr create -B ${{ github.ref_name }} -H $BRANCH_NAME -t "$TITLE" -b "$BODY" --label "line-openapi-update"
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}