Update RBI files for parser.

Library/Homebrew/sorbet/rbi/gems/parser@3.0.3.0.rbi

@@ -1,9 +1,9 @@
+# typed: true
+
 # DO NOT EDIT MANUALLY
 # This is an autogenerated file for types exported from the `parser` gem.
 # Please instead update this file by running `bin/tapioca gem parser`.
 
-# typed: true
-
 module Parser
   class << self
     private
@@ -280,6 +280,7 @@ class Parser::Builders::Default
   def optarg(name_t, eql_t, value); end
   def pair(key, assoc_t, value); end
   def pair_keyword(key_t, value); end
+  def pair_label(key_t); end
   def pair_list_18(list); end
   def pair_quoted(begin_t, parts, end_t, value); end
   def parser; end