chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/build-and-test.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose
     - name: Run tests

.github/workflows/clippy.yml

@@ -7,7 +7,7 @@ jobs:
   clippy_check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - run: rustup component add clippy
       - uses: actions-rs/clippy-check@v1
         with: