Fixed tempaltize -> templatize typo

Author: CSLTech

lib/utils/templatize.html

@@ -291,7 +291,7 @@
      *     // Get a template from somewhere, e.g. light DOM
      *     let template = this.querySelector('template');
      *     // Prepare the template
-     *     let TemplateClass = Polymer.Tempaltize.templatize(template);
+     *     let TemplateClass = Polymer.Templatize.templatize(template);
      *     // Instance the template with an initial data model
      *     let instance = new TemplateClass({myProp: 'initial'});
      *     // Insert the instance's DOM somewhere, e.g. element's shadow DOM