Minor readme fixes

Author: Nyholm

src/bref/README.md

@@ -425,17 +425,17 @@ use Bref\Context\Context;
 use Bref\Event\Handler;
 use Runtime\Bref\Timeout\LambdaTimeout;
 
-class Handler implements Handler
+class MySlowHandler implements Handler
 {
     public function handle($event, Context $context)
     {
         try {
             // your code here
             // ...
         } catch (LambdaTimeoutException $e) {
-            echo 'Oops, sorry. We spent too much time on this.';
+            return 'Oops, sorry. We spent too much time on this.';
         } catch (\Throwable $e) {
-            echo 'Some other unexpected error happened.';
+            return 'Some other unexpected error happened.';
         }
     }
 }