Show notification of new docs: latex, jq

assets/javascripts/news.json

@@ -1,4 +1,8 @@
 [
+  [
+      "2021-05-26",
+      "New documentations: <a href=\"/latex/\">LaTeX</a>, <a href=\"/jq/\">jq</a>"
+  ],
   [
     "2021-04-29",
     "Added <code class=\"_label\">alt + c</code> shortcut to copy URL of original page."