Fix typo

Update connexion/apis/abstract.py

Co-authored-by: Ruwann <ruwan.lambrichts@ml6.eu>

connexion/apis/abstract.py

@@ -51,7 +51,7 @@ def __init__(
         :param base_path: Base path to host the API.
         :param resolver: Callable that maps operationID to a function
         :param resolver_error_handler: Callable that generates an Operation used for handling
-            ResolveErrors
+            ResolverErrors
         :param arguments: Jinja arguments to resolve in specification.
         :param options: New style options dictionary.
         """