Add dev/benchmarks example apps to test patterns (#2170)

diff --git a/app_dart/lib/src/request_handlers/github/webhook_subscription.dart b/app_dart/lib/src/request_handlers/github/webhook_subscription.dart
index c514348..5fc0931 100644
--- a/app_dart/lib/src/request_handlers/github/webhook_subscription.dart
+++ b/app_dart/lib/src/request_handlers/github/webhook_subscription.dart
@@ -311,7 +311,7 @@
         filename.startsWith('dev/bots/test.dart') ||
         filename.startsWith('dev/devicelab/bin/tasks') ||
         filename.startsWith('dev/devicelab/lib/tasks') ||
-        filename.startsWith('dev/devicelab/lib/tasks') ||
+        filename.startsWith('dev/benchmarks') ||
         objectiveCTestRegex.hasMatch(filename);
   }
 
diff --git a/app_dart/test/request_handlers/github/webhook_subscription_test.dart b/app_dart/test/request_handlers/github/webhook_subscription_test.dart
index 4186417..6e428be 100644
--- a/app_dart/test/request_handlers/github/webhook_subscription_test.dart
+++ b/app_dart/test/request_handlers/github/webhook_subscription_test.dart
@@ -1040,6 +1040,7 @@
           PullRequestFile()..filename = 'dev/bots/test.dart',
           PullRequestFile()..filename = 'dev/devicelab/bin/tasks/analyzer_benchmark.dart',
           PullRequestFile()..filename = 'dev/devicelab/lib/tasks/plugin_tests.dart',
+          PullRequestFile()..filename = 'dev/benchmarks/microbenchmarks/lib/foundation/all_elements_bench.dart',
         ]),
       );