Update c-cpp.yml

Update Node.js version from checkout@v2 to checkout@v4

.github/workflows/c-cpp.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: preconf
       run: autoreconf -ivf
     - name: configure