ci: add gcc --version

.github/workflows/ci.yml

@@ -15,6 +15,8 @@ jobs:
       - name: 'Install Build Tools'
         run: 'sudo apt-get install --yes build-essential gcc make clang-format'
 
+      - run: 'gcc --version'
+
       - run: 'make'
       - run: 'make run'
       - run: 'make test'