add two instances

close #607
close #625

Author: unixfox

docs/instances.md

@@ -14,6 +14,10 @@
 
 * [inv.nadeko.net](https://inv.nadeko.net) 🇨🇱 - Source code/changes: https://git.nadeko.net/Fijxu/invidious - CAPTCHA: mCaptcha (https://mcaptcha.org/)
 
+* [invidious.f5.si](https://invidious.f5.si) 🇯🇵 - Cloudflare
+
+* [invidious.schenkel.eti.br](invidious.schenkel.eti.br) 🇧🇷 - Cloudflare
+
 ### Tor Onion Services:
 
 * [inv.nadekonw7plitnjuawu6ytjsl7jlglk2t6pyq6eftptmiv3dvqndwvyd.onion](http://inv.nadekonw7plitnjuawu6ytjsl7jlglk2t6pyq6eftptmiv3dvqndwvyd.onion) 🇨🇱 (Onion of inv.nadeko.net)