Update sass constraint again

Author: parlough

pubspec.yaml

@@ -27,7 +27,7 @@ dev_dependencies:
   dart_style: ^3.0.0
   lints: ^5.0.0
   matcher: ^0.12.15
-  sass: ^1.86.0
+  sass: ^1.86.2
   test: ^1.24.2
   test_descriptor: ^2.0.1
   test_process: ^2.0.3