Fix type error for inreplace.

`inreplace "file.c", "a", "b"` is a common idiom in
formula install blocks.

Library/Homebrew/utils/inreplace.rb

@@ -34,7 +34,7 @@ module Utils
     # @api public
     sig do
       params(
-        paths:        T::Array[T.untyped],
+        paths:        T.any(T::Array[T.untyped], String),
         before:       T.nilable(T.any(Regexp, String)),
         after:        T.nilable(T.any(String, Symbol)),
         audit_result: T::Boolean,