Set default invidious instance back to invidio.us

Requested by Perflyst

nitter.conf

@@ -32,7 +32,7 @@ tokenCount = 10
 [Preferences]
 theme = "Nitter"
 replaceTwitter = "nitter.net"
-replaceYouTube = "invidious.snopyta.org"
+replaceYouTube = "invidio.us"
 replaceInstagram = ""
 proxyVideos = true
 hlsPlayback = false