Improve community related content

[st0012]

Main changes:

1. I think rubyvideo.dev is doing an amazing job indexing videos from Ruby conferences and is a great resource to be listed along with "Ruby Conferences".
2. Nowadays newsletters like RubyWeekly or Short Ruby Newsletter is a equally if not more common way for Ruby developers to get their news from the community. So I think it's good to at least put it at the same level as the "Blogs" list.
   • I decided to NOT rename the page's path so old links can still work.
3. The open directory links are both dead so I removed them and gave more space to "Ruby Central".
4. Minor tweaks on phrasing and updated the Rails blog's link

[st0012]

cc @marcoroth @lucianghinda
Let me know if you’re ok with the descriptions?

[lucianghinda]

@st0012

cc @marcoroth @lucianghinda Let me know if you’re ok with the descriptions?

Thank you. I think you described very well the ShortRuby Newsletter

[martinemde]

Content and language looks good to me. Adding Ruby Weekly and Short Ruby seems important.

[st0012]

@jeremyevans @BurdetteLamar do you mind giving this a look 😄

[jeremyevans]

All changes look good to me! Thank you for working on this.

[BurdetteLamar]

@jeremyevans @BurdetteLamar do you mind giving this a look 😄

Looks good to me.

[JuanitoFatas]

Great updates 🙌🏻

I’ve checked these render correctly