Fix remaining Pause → Delayed in examples and docs

docs/managing-concurrency.md

@@ -29,7 +29,7 @@ The addition of generators in PHP 5.5 trivializes synchronization and error hand
 use Amp\Loop;
 
 function asyncMultiply($x, $y) {
-    yield new Amp\Pause($millisecondsToPause = 100);
+    yield new Amp\Delayed($millisecondsToPause = 100);
     return $x * $y;
 }
 

examples/iterators/backpressure.php

@@ -32,7 +32,7 @@ Loop::run(function () {
 
         while (yield $iterator->advance()) {
             printf("Emitter emitted %d\n", $iterator->getCurrent());
-            yield new Pause(500); // Listener consumption takes 500 ms.
+            yield new Delayed(500); // Listener consumption takes 500 ms.
         }
     } catch (\Exception $exception) {
         printf("Exception: %s\n", $exception);