Add link to content package page to top-level dropdown menu

[branrickman]

The current home page (https://www.kiwix.org/en/) only lists reader and wifi hotspot under the top level dropdown:

In order to find the content packages you have to scroll to the bottom of the page:

Is there a reason the content packages are so hidden?

[kelson42]

Supportive of this! I kind of believed I reported that problem in the past as well.

[Popolechien]

Fixed! Thanks for the flag.