Fixes the reST syntax of an example in the docs

reST example of the section "Linking to internal content" had incorrect
metadata. Moreover, time was missing from the date of both markdown and
reST example.

This was pointed out by [lefromage at #pelican](https://botbot.me/freenode/pelican/msg/2235275/)
Merge pull request #764 from talha131/master

Fixes the reST syntax of an example in the docs