activesupport: Update the type of Array.wrap

this also changes the case of `[T] (T ele) -> [T]` to `-> Array[T]`

gems/activesupport/6.0/activesupport.rbs

@@ -503,7 +503,7 @@ class Array[unchecked out Elem]
   # apply to the rest of <tt>object</tt>s.
   def self.wrap: (nil) -> Array[untyped]
                | [T] (_ToAry[T] array_like) -> Array[T]
-               | [T] (T ele) -> [T]
+               | [T] (T ele) -> Array[T]
 end
 
 module ActiveSupport