Update workflow.

Author: Galfurian

.github/workflows/ubuntu.yml

@@ -42,7 +42,9 @@ jobs:
         include:
           [
             # GCC
+            { pkgs: "gcc-9  g++-9", cc: gcc-9, cxx: g++-9, os: ubuntu-latest },
             { pkgs: "gcc-10 g++-10", cc: gcc-10, cxx: g++-10, os: ubuntu-latest },
+            { pkgs: "gcc-11 g++-11", cc: gcc-11, cxx: g++-11, os: ubuntu-latest },
             { pkgs: "gcc-12 g++-12", cc: gcc-12, cxx: g++-12, os: ubuntu-latest },
             { pkgs: "gcc-13 g++-13", cc: gcc-13, cxx: g++-13, os: ubuntu-latest },
             { pkgs: "gcc-14 g++-14", cc: gcc-14, cxx: g++-14, os: ubuntu-latest },
@@ -51,6 +53,8 @@ jobs:
             { pkgs: "clang-15 clang++-15", cc: clang-15, cxx: clang++-15, os: ubuntu-latest },
             { pkgs: "clang-16 clang++-16", cc: clang-16, cxx: clang++-16, os: ubuntu-latest },
             { pkgs: "clang-17 clang++-17", cc: clang-17, cxx: clang++-17, os: ubuntu-latest },
+            { pkgs: "clang-18 clang++-18", cc: clang-18, cxx: clang++-18, os: ubuntu-latest },
+            { pkgs: "clang-19 clang++-19", cc: clang-19, cxx: clang++-19, os: ubuntu-latest },
           ]
 
     # Set environment variables for compiler executables