Roll chromium to r641577 (#1052)

Author: kblok

lib/PuppeteerSharp/BrowserFetcher.cs

@@ -38,7 +38,7 @@ public class BrowserFetcher
         /// <summary>
         /// Default Chromium revision.
         /// </summary>
-        public const int DefaultRevision = 637110;
+        public const int DefaultRevision = 641577;
 
         /// <summary>
         /// Gets the downloads folder.