Added Evan to unified checkrun beta testers (#5052)

Added Evan to unified check run beta testers

app_dart/config.yaml

diff --git a/app_dart/config.yaml b/app_dart/config.yaml
index 770abb3..dd15441 100644
--- a/app_dart/config.yaml
+++ b/app_dart/config.yaml
@@ -36,3 +36,4 @@
     - eyebrowsoffire
     - andywolff
     - camsim99
+    - walley892

app_dart/lib/src/generated_config.dart

diff --git a/app_dart/lib/src/generated_config.dart b/app_dart/lib/src/generated_config.dart
index d1bf3d3..b756224 100644
--- a/app_dart/lib/src/generated_config.dart
+++ b/app_dart/lib/src/generated_config.dart
@@ -40,5 +40,5 @@
     - eyebrowsoffire
     - andywolff
     - camsim99
-    - justinmc
+    - walley892
 ''';