Properly appending the apt commands in the yml

.github/workflows/cmake.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Setup Environment
       run:   |
              if [ "$RUNNER_OS" == "Linux" ]; then
-                  sudo apt-get update \
+                  sudo apt-get update && \
                   sudo apt-get install -y \
                     build-essential \
                     nasm \