[cfe] Update expectations

This fell between commits.

Change-Id: Ie76f330f42ea8424704cc44490a573ca7879b40c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/290525
Auto-Submit: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>

pkg/front_end/testcases/patterns/dynamic_guard.dart.weak.expect

@@ -42,6 +42,7 @@ static method main() → dynamic {
           break #L1;
         }
       }
+      throw new _in::ReachabilityError::•("`null` encountered as case in a switch expression with a non-nullable type.");
     }
   } =>#t3;
   #L2:

pkg/front_end/testcases/patterns/dynamic_guard.dart.weak.modular.expect

@@ -42,6 +42,7 @@ static method main() → dynamic {
           break #L1;
         }
       }
+      throw new _in::ReachabilityError::•("`null` encountered as case in a switch expression with a non-nullable type.");
     }
   } =>#t3;
   #L2:

pkg/front_end/testcases/patterns/dynamic_guard.dart.weak.transformed.expect

@@ -42,6 +42,7 @@ static method main() → dynamic {
           break #L1;
         }
       }
+      throw new _in::ReachabilityError::•("`null` encountered as case in a switch expression with a non-nullable type.");
     }
   } =>#t3;
   #L2: