CMake: disable Clang deprecations (`sprintf()') on sanitize

README: Copyright 2022 -> 2023
github: try gcc-12 for 32-bit Ubuntu

.github/workflows/ci.yml

@@ -85,6 +85,9 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    - name: Install gcc-12
+      run: sudo apt install -y gcc-12 g++-12
+
     - name: Install multilibs
       run: sudo apt install gcc-multilib g++-multilib