gha: update actions/checkout@v4

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

.github/workflows/test.yml

@@ -13,14 +13,14 @@ jobs:
       with:
         go-version: ${{ matrix.go }}
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Test
       run: go test -v ./...
   lint:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: go mod tidy
         run: |
           go mod tidy