Bump build_runner from 2.2.0 to 2.2.1 in /dashboard (#2129)

diff --git a/dashboard/pubspec.lock b/dashboard/pubspec.lock
index 789e94e..b3ed568 100644
--- a/dashboard/pubspec.lock
+++ b/dashboard/pubspec.lock
@@ -70,7 +70,7 @@
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "2.2.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -323,7 +323,7 @@
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0"
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
@@ -447,7 +447,7 @@
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.1"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -489,7 +489,7 @@
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.13"
+    version: "0.4.12"
   timing:
     dependency: transitive
     description:
@@ -566,7 +566,7 @@
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.3"
+    version: "2.1.2"
   watcher:
     dependency: transitive
     description:
@@ -589,5 +589,5 @@
     source: hosted
     version: "3.1.1"
 sdks:
-  dart: ">=2.18.0-146.0.dev <3.0.0"
+  dart: ">=2.17.0 <3.0.0"
   flutter: ">=2.10.0"
diff --git a/dashboard/pubspec.yaml b/dashboard/pubspec.yaml
index ce8c3e9..8111271 100644
--- a/dashboard/pubspec.yaml
+++ b/dashboard/pubspec.yaml
@@ -34,7 +34,7 @@
   flutter_app_icons: ^0.0.8
 
 dev_dependencies:
-  build_runner: ^2.2.0
+  build_runner: ^2.2.1
   flutter_lints: ^2.0.1
   flutter_test:
     sdk: flutter