Update endpoint from HTTP to HTTPS (#5622)

plugins/node/node.plugin.zsh

@@ -2,5 +2,5 @@
 # TODO: Make the section part easier to use.
 function node-docs {
   local section=${1:-all}
-  open_command "http://nodejs.org/docs/$(node --version)/api/$section.html"
+  open_command "https://nodejs.org/docs/$(node --version)/api/$section.html"
 }