Update hostname for piped (#728)

nitter.example.conf

@@ -37,7 +37,7 @@ tokenCount = 10
 [Preferences]
 theme = "Nitter"
 replaceTwitter = "nitter.net"
-replaceYouTube = "piped.kavin.rocks"
+replaceYouTube = "piped.video"
 replaceReddit = "teddit.net"
 replaceInstagram = ""
 proxyVideos = true