ci: ensure we checkout before publish

Author: jacobbednarz

.github/workflows/release.yml

@@ -103,6 +103,9 @@ jobs:
     needs: build
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event.inputs.ref || github.ref }}
       - name: Download archives
         uses: actions/download-artifact@v8
         with: