Merge pull request #3541 from PyO3/dependabot/github_actions/actions/checkout-4

Bump actions/checkout from 3 to 4

Author: davidhewitt

.github/workflows/benches.yml

@@ -13,7 +13,7 @@ jobs:
   benchmarks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
       - uses: dtolnay/rust-toolchain@stable