docs: Update cpp.md to indicate GDB version requirements (#40027)

Release Notes:

- N/A

---------

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>

docs/src/languages/cpp.md

@@ -137,6 +137,7 @@ You can use CodeLLDB or GDB to debug native binaries. (Make sure that your build
 
 - [CodeLLDB configuration documentation](https://github.com/vadimcn/codelldb/blob/master/MANUAL.md#starting-a-new-debug-session)
 - [GDB configuration documentation](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Debugger-Adapter-Protocol.html)
+  - GDB needs to be at least v14.1
 
 ### Build and Debug Binary