Typo fix in changelog tool

Author: olleolleolle

rake/changelog.rb

@@ -21,7 +21,7 @@ def run
   def ensure_new_version_specified
     tags = `git tag -l`
     return unless tags.include? Changelog.current_version
-    print "Are you updating the 'master' CHANELOG? [yes/no] "
+    print "Are you updating the 'master' CHANGELOG? [yes/no] "
     abort("Please update lib/gemstash/version.rb with the new version first!") unless STDIN.gets.strip.casecmp("yes") == 0
     @master_update = true
   end