Fix function call name token type in function_indexes method

Currently, the method `function_indexes` in `lib/puppet-lint/data.rb` doesn't work and only returns empty arrays. This is because, when iterating over the `token` array, tokens are skipped if their type does not equal `:NAME` but tokens that represent function call declarations have the type `:FUNCTION_NAME` and are skipped during iteration.

lib/puppet-lint/data.rb

@@ -386,7 +386,7 @@ def function_indexes
       @function_indexes ||= begin
         functions = []
         tokens.each_with_index do |token, token_idx|
-          next unless token.type == :NAME
+          next unless token.type == :FUNCTION_NAME
           next unless token_idx.zero? ||
                       (token_idx == 1 && tokens[0].type == :WHITESPACE) ||
                       [:NEWLINE, :INDENT].include?(token.prev_token.type) ||