Incorporate some of the ideas from the Accessible and Inclusive Events Guide - and link to it

[robintw]

This guide has a lot of very useful tips for how to make an event accessible and inclusive: https://alexwlchan.net/ideas-for-inclusive-events/

[shoaibsufi]

We won't be merging in anything - due to our contribution guide - https://github.com/softwaresaved/event-organisation-guide/blob/master/CONTRIBUTING.md

However we will investigate at some stage where to link. We may also decide on a specific inclusiveness policy if we enact this at a future event and can also reflect on trying to more proactively manage inclusivity.