Insiders link in Issue Template is 404'd

[C.D. MacEachern]

Oni Version:
All

Neovim Version (Linux only):
Operating System:
All

Issue:
Template says to become insider visit https://www.onivim.io/Insiders but this url returns 404.

Expected behavior:
The webpage to load.

Actual behavior:
404 error.

Steps to reproduce:
Click link: (https://www.onivim.io/Insiders)