Update actions/checkout digest to 0ad4b8f

Author: renovate[bot]

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
         os: [macos-10.15, macos-11, macos-12]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
       - name: Install dependencies
         run: |
           python3 --version