update docs tag

Author: vladikoff

package.json

@@ -34,7 +34,7 @@
     "grunt-contrib-less": "~2.1.0",
     "grunt-contrib-pug": "~3.0.0",
     "grunt-contrib-uglify": "~5.2.2",
-    "grunt-docs": "https://github.com/gruntjs/grunt-docs.git#154b2b6ebc69c51bdf7cab5f2f54ce12b9d73eb1",
+    "grunt-docs": "https://github.com/gruntjs/grunt-docs.git#3e2e8cb49eca61cd1cbc4867a2de18f7b0bcc16f",
     "grunt-sitemap": "~1.2.1",
     "highlight.js": "~9.12.0",
     "less-plugin-clean-css": "~1.6.0",
@@ -54,4 +54,4 @@
     "grunt-open": "^0.2.4",
     "grunt-puglint": "~1.0.0"
   }
-}
+}