Update pkg butler

Author: davidanthoff

.github/workflows/jlpkgbutler-butler-workflow.yml

@@ -14,7 +14,7 @@ jobs:
     name: "Run Package Butler"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: davidanthoff/julia-pkgbutler@releases/v1
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}