gui, man, authors: Update docs, translations, and contributors

gui/default/assets/lang/lang-si.json

@@ -282,7 +282,6 @@
     "Preview": "පෙරදසුන",
     "Preview Usage Report": "භාවිතාවේ වාර්තාව පෙරදසුන",
     "QR code": "QR code",
-    "QUIC": "QUIC",
     "QUIC LAN": "QUIC LAN",
     "QUIC WAN": "QUIC WAN",
     "QUIC connections are in most cases considered suboptimal": "QUIC connections are in most cases considered suboptimal",
@@ -293,7 +292,6 @@
     "Received data is already encrypted": "ලැබුණු දත්ත දැනටමත් සංකේතිතයි",
     "Recent Changes": "වෙනස්කම්",
     "Reduced by ignore patterns": "නොසලකා හැරීමේ රටා මගින් අඩු කර ඇත",
-    "Relay": "Relay",
     "Relay LAN": "Relay LAN",
     "Relay WAN": "Relay WAN",
     "Release Notes": "නිකුතු සටහන්",