Update CI workflow to build and run gpt2

Author: ginoitaliano

.github/workflows/c-cpp.yml

@@ -8,16 +8,13 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v4
-    - name: configure
-      run: ./configure
-    - name: make
-      run: make
-    - name: make check
-      run: make check
-    - name: make distcheck
-      run: make distcheck
+
+    - name: Build
+      run: gcc -O3 -mavx -pthread -o gpt2 gpt2_opt.c -lm
+
+    - name: Run
+      run: ./gpt2