fix missing handling of ?

Author: ValekoZ

gef.py

@@ -8946,9 +8946,9 @@ def do_invoke(self, _: List[str], **kwargs: Any) -> None:
                 addr = safe_parse_and_eval(arg)
 
             if addr is None:
-                if arg[0] in 'r-' and \
-                        arg[1] in 'w-' and \
-                        arg[2] in 'x-':
+                if arg[0] in 'r-?' and \
+                        arg[1] in 'w-?' and \
+                        arg[2] in 'x-?':
                     perms.union(Permission.from_filter_repr(arg))
                     continue