Bump actions/checkout from 3 to 4 (#93)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/checks.yml

@@ -26,7 +26,7 @@ jobs:
         action: [clippy, fmt, test]
     steps:
       - name: Fetch latest code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup build environment
         if: matrix.action != 'fmt'
         run: rustup show

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Fetch latest code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Login
         run: cargo login ${{ secrets.CARGO_REGISTRY_TOKEN }}
       - name: Publish