Update XSLT & XPath documentation

lib/docs/scrapers/mdn/xslt_xpath.rb

@@ -1,5 +1,6 @@
 module Docs
   class XsltXpath < Mdn
+    # release = '2021-10-22'
     self.name = 'XSLT & XPath'
     self.slug = 'xslt_xpath'
     self.base_url = 'https://developer.mozilla.org/en-US/docs/Web'