Add a GCC 12 job without sanitization

.github/workflows/ci.yml

@@ -49,6 +49,10 @@ jobs:
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-20.04
             install: g++-11
+          - toolset: gcc-12
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-22.04
+            install: g++-12
           - toolset: gcc-12
             cxxstd: "03,11,14,17,2a"
             os: ubuntu-22.04