Upgrade checkout action version

Author: flanglet

.github/workflows/c-cpp.yml

@@ -15,6 +15,6 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - name: make
       run: cd src && make clean && make all