Update build-ci.yml

Author: apicalshark

.github/workflows/build-ci.yml

@@ -100,8 +100,8 @@ jobs:
                   sudo apt install software-properties-common
                   sudo add-apt-repository ppa:ubuntu-toolchain-r/test
                   sudo apt update
-                  sudo apt install gcc-13 g++-13
-                  sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-13 13 --slave /usr/bin/g++ g++ /usr/bin/g++-13
+                  sudo apt install gcc-12 g++-12
+                  sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 12 --slave /usr/bin/g++ g++ /usr/bin/g++-12
 
             - name: Build
               id: cmake_build