C++: Update supported compiler versions after frontend update

Author: jketema

docs/codeql/reusables/supported-versions-compilers.rst

@@ -4,9 +4,9 @@
    :stub-columns: 1
 
    Language,Variants,Compilers,Extensions
-   C/C++,"C89, C99, C11, C17, C++98, C++03, C++11, C++14, C++17, C++20 [1]_ [2]_","Clang (including clang-cl [3]_ and armclang) extensions (up to Clang 17.0),
+   C/C++,"C89, C99, C11, C17, C++98, C++03, C++11, C++14, C++17, C++20 [1]_ [2]_","Clang (including clang-cl [3]_ and armclang) extensions (up to Clang 19.1.0),
 
-   GNU extensions (up to GCC 13.2),
+   GNU extensions (up to GCC 15.0),
 
    Microsoft extensions (up to VS 2022),