Increase latency evaluation period (#10360)

* Increase the article rendering app latency evalution period so we only scale up if latency is increased for 2.5 minutes

* update snapshot

Author: alinaboghiu

dotcom-rendering/cdk/lib/__snapshots__/renderingStack.test.ts.snap

@@ -688,7 +688,7 @@ exports[`The RenderingCDKStack matches the snapshot 1`] = `
             },
           },
         ],
-        "EvaluationPeriods": 1,
+        "EvaluationPeriods": 5,
         "MetricName": "TargetResponseTime",
         "Namespace": "AWS/ApplicationELB",
         "Period": 30,

dotcom-rendering/cdk/lib/renderingStack.ts

@@ -175,7 +175,7 @@ export class RenderingCDKStack extends CDKStack {
 					},
 				],
 				adjustmentType: AdjustmentType.PERCENT_CHANGE_IN_CAPACITY,
-				evaluationPeriods: 1,
+				evaluationPeriods: 5,
 			},
 		);