Merge pull request #4 from organisationsnummer/renovate/actions-check…

…out-4.x

Update actions/checkout action to v4

.github/workflows/rust.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build
         run: cargo build --verbose
       - name: Run tests