Use <cctype> in debug_dump header

Replace the C header `<ctype.h>` with the C++ equivalent `<cctype>` in `debug_dump.h` to align with C++ include conventions and improve standard-library compatibility.

Author: vanvught

common/include/firmware/debug/debug_dump.h

@@ -28,7 +28,7 @@
 
 #include <cstdint>
 #include <cstdio>
-#include <ctype.h>
+#include <cctype>
 
 #include "firmware/debug/debug_config.h"