pr body changes

.github/workflows/flake-update.yml

@@ -93,7 +93,6 @@ jobs:
             - name: Remove temporary files
               run: |
                 rm pr_body.template
-                rm pr_body.md
                 rm pre.json
                 rm post.json
                 rm post-diff
@@ -103,7 +102,8 @@ jobs:
               uses: https://nayeonie.com/ahuston-0/create-pull-request@main
               with:
                 token: ${{ secrets.GH_TOKEN_FOR_UPDATES  }}
-                body: ${{ steps.pr_body.outputs.content }}
+                add-paths: flake.lock
+                body-path: pr_body.md
                 author: '"github-actions[bot]" <github-actions[bot]@users.noreply.github.com>'
                 title: 'automated: Update `flake.lock`'
                 commit-message: |