Bump yaml from 3.1.0 to 3.1.1 in /device_doctor (#1845)

diff --git a/device_doctor/pubspec.lock b/device_doctor/pubspec.lock
index 3ede47f..85df098 100644
--- a/device_doctor/pubspec.lock
+++ b/device_doctor/pubspec.lock
@@ -483,6 +483,6 @@
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.0"
+    version: "3.1.1"
 sdks:
   dart: ">=2.16.0 <3.0.0"