address more comments from @janste63

jschlyter · jschlyter · commit cf76011439f2 · 2021-04-12T16:54:44.000+02:00
diff --git a/src/cryptojwt/key_bundle.py b/src/cryptojwt/key_bundle.py
@@ -834,6 +834,7 @@ def dump(self, exclude_attributes: Optional[List[str]] = None):
 
         return res
 
+    @keys_writer
     def load(self, spec):
         """
         Sets attributes according to a specification.
