Update bump.yml

Author: henryiii

.github/workflows/bump.yml

@@ -13,7 +13,7 @@ jobs:
     name: Bump versions
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
       - run: pipx run nox -s pc_bump
         env:
           GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}