Update core/kernel.rbs

Co-authored-by: Jimmy H <[email protected]>

core/kernel.rbs

@@ -490,7 +490,7 @@ module Kernel : BasicObject
   #     Hash(nil)              # => {}
   #     Hash([])               # => {}
   #
-  def self?.Hash: [K, V] (nil | [] _empty) -> Hash[K, V]
+  def self?.Hash: (nil | [] _empty) -> Hash[untyped, untyped]
                 | [K, V] (_ToHash[K, V] hash_like) -> Hash[K, V]
 
   # <!--