Reorganize navigation header

Remove redundant link to / in the navigation header, the link in the
logo is enough conventionally.

Reprioritize the documentation and comunity links: the idea is the user
will want to see news, information about the project, development links,
and *only then* check the other links.

Author: fmoralesc

_data/nav.yml

@@ -1,12 +1,10 @@
-- title: Home
-  url: /
 - title: News
   url: /news/
-- title: Documentation
-  url: /doc/
-- title: Community
-  url: /community/
 - title: Development
   url: https://github.com/neovim/neovim
+- title: Community
+  url: /community/
+- title: Documentation
+  url: /doc/
 - title: Sponsors
   url: /sponsors/