Fix docs for #generate

README.md

@@ -522,15 +522,15 @@ So, normally you'd only use this attached to primitive types without further pro
 Passing a proc will evaluate the proc on every invocation. Use this for generated values.
 
 ```ruby
-random_number = Types::Numeric.static { rand }
+random_number = Types::Numeric.generate { rand }
 random_number.parse # 0.32332
 random_number.parse('foo') # 0.54322 etc
 ```
 
 Note that the type of generated value must match the initial step's type, validated at invocation.
 
 ```ruby
-random_number = Types::String.static { rand } # this won't raise an error here
+random_number = Types::String.generate { rand } # this won't raise an error here
 random_number.parse # raises Plumb::ParseError because `rand` is not a String
 ```