Update c-cpp.yml

.github/workflows/c-cpp.yml

@@ -13,6 +13,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+    - name: Install pandoc package
+      run: |
+         sudo apt-get -y install pandoc
     - name: autoconf
       run: autoreconf -i
     - name: configure