Set title and description written in line-openapi PR again (#1123)

originally, line/line-openapi#74 expected to
call scripts after calling generate-code.py. However,
#1074 calls the scripts
after some processes. This results unexpected behavior.... I hope this
change fixes it.

.github/workflows/update-code.yml

@@ -50,19 +50,7 @@ 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 line-openapi
-          git add lib/**
-          git commit -m "Codes are generated by openapi"
-
-          git push origin $BRANCH_NAME
-
-          # Determine Change Type via Submodule Script
+          # Determine Change Type via Submodule Script. This scripts read current uncommited changes.
           CHANGE_TYPE=$(npx zx ./line-openapi/tools/determine-change-type.mjs)
           echo "Determined change type: $CHANGE_TYPE"
 
@@ -79,6 +67,19 @@ 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 line-openapi
+          git add lib/**
+          git commit -m "Codes are generated by openapi"
+
+          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 }}