grunt/change-version.js:replaceRecursively(): Use accidentally-unused…

… argument

How did the linters miss this?

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grunt/change-version.js

@@ -67,7 +67,7 @@ function replaceRecursively(directory, excludedDirectories, allowedExtensions, o
  console.log('EXCLUDED:' + filepath);
  }
  });
- walkAsync('.', excludedDirectories, updateFile, function (err) {
+ walkAsync(directory, excludedDirectories, updateFile, function (err) {
  console.error('ERROR while traversing directory!:')
  console.error(err);
  process.exit(1);