Bump the version of package:web_benchmark (#9721)

Fixes flutter/flutter#183335

Author: mdebbar

packages/devtools_app/pubspec.yaml

@@ -76,7 +76,7 @@ dev_dependencies:
   stager: ^1.3.0
   stream_channel: ^2.1.1
   test: ^1.21.0
-  web_benchmarks: ^4.1.0
+  web_benchmarks: ^4.1.1
   webdriver: ^3.1.0
   webkit_inspection_protocol: ">=0.5.0 <2.0.0"