js/kokori.js: make a beutification function for pubDate so the list of news items is prettier

[marado]

Currently, the front page shows:

    Sun, 23 Mar 2025 17:06:16 GMT idiossINcrasias - Vol. 1
    Sat, 23 Dec 2024 17:27:17 GMT Inércia 2024 - Clara da Lua Negra
    Sat, 07 Jul 2024 17:17:17 GMT Cães Danados - Raindogs Cover Songs
    Sat, 18 May 2024 18:03:00 GMT kokori and Sieben, in support to Ukraine
    Tue, 13 Jun 2023 18:12:00 GMT rootkit, now on CD
    Sat, 01 Jun 2019 17:57:32 GMT Flagelo
    Sat, 13 Oct 2018 15:53:32 GMT Ode Filípica Tribute
    Sat, 31 Mar 2018 21:37:32 GMT Quest For A Red Moon
    Sun, 09 Jul 2017 22:47:12 GMT Friend of the Dog
    Sun, 02 Oct 2016 17:55:07 GMT Kokori present on CC Mixtape
    Sun, 08 May 2016 00:44:05 GMT Kokori participates in Portuguese Industrial compilation
    Wed, 16 Dec 2015 12:15:04 GMT Kokori announces first full-length album: Rootkit
    Fri, 19 Jun 2015 11:14:02 GMT The Prisioner is out
    Fri, 24 Apr 2015 00:01:02 GMT Metaphysical Circuits 3x tape compilation

It would be prettier and more legible (specially on mobile) if the date was shoter, something like dd Mon yyyy or even just Mon yyyy.