LibWeb: Prefix AK::Duration with AK Namespace

Author: https://github.com/ADKaster
Commit: b20a1d0fcd
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/676
Reviewed-by: https://github.com/AtkinsSJ ✅
Reviewed-by: https://github.com/trflynn89 ✅

Userland/Libraries/LibWeb/HTML/EventSource.cpp

@@ -399,7 +399,7 @@ void EventSource::process_field(StringView field, StringView value)
         // If the field value consists of only ASCII digits, then interpret the field value as an integer in base ten,
         // and set the event stream's reconnection time to that integer. Otherwise, ignore the field.
         if (auto retry = value.to_number<i64>(); retry.has_value())
-            m_reconnection_time = Duration::from_seconds(*retry);
+            m_reconnection_time = AK::Duration::from_seconds(*retry);
     }
     // -> Otherwise
     else {