Update actions in c-cpp.yml

.github/workflows/c-cpp.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: bootstrap
       run: |
         sudo apt install libusb-1.0-0-dev