Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/nix.yml

@@ -26,7 +26,7 @@ jobs:
           name: cclib
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
       # Checkout of the current head in the working dir
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           persist-credentials: false
       - name: Check nix flake

.github/workflows/pre-commit.yml

@@ -15,7 +15,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           persist-credentials: false
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5