Cleanup: update username in code-comments: campbellbarton -> ideasman42

Gitea migration changed my username, update code-comments.

source/blender/python/intern/bpy_interface_atexit.c

@@ -32,7 +32,7 @@ static PyObject *func_bpy_atregister = NULL; /* borrowed reference, `atexit` hol
 
 static void atexit_func_call(const char *func_name, PyObject *atexit_func_arg)
 {
-  /* NOTE(@campbellbarton): no error checking, if any of these fail we'll get a crash
+  /* NOTE(@ideasman42): no error checking, if any of these fail we'll get a crash
    * this is intended, but if its problematic it could be changed. */
 
   PyObject *atexit_mod = PyImport_ImportModuleLevel("atexit", NULL, NULL, NULL, 0);