show redirect-after banner now

really we should have shown this starting on the 20th or so, and there is no EU 2023 banner ...

and EU 2023 is sold out anyhow

Author: BenTheElder

data/announcements/scheduled.yaml

@@ -143,7 +143,7 @@ announcements:
     Please read our [announcement](/blog/2023/02/06/k8s-gcr-io-freeze-announcement/) for more details.
 
 - name: Redirecting k8s.gcr.io - Before
-  startTime: 2023-03-10T00:00:00 # This should run before and after Kubecon EU 2023
+  startTime: 2023-03-10T00:00:00 # This should run before the redirect
   endTime: 2023-03-26T00:00:00
   style: "background: #c70202"
   title: Legacy k8s.gcr.io container image registry will be redirected to registry.k8s.io
@@ -153,7 +153,7 @@ announcements:
     Please read our [announcement](/blog/2023/03/10/image-registry-redirect/) for more details.
 
 - name: Redirecting k8s.gcr.io - After
-  startTime: 2023-04-05T00:00:00 # This should run before and after Kubecon EU 2023
+  startTime: 2023-03-27T00:00:00 # This should run after the redirect begins
   endTime: 2023-05-31T00:00:00
   style: "background: #c70202"
   title: Legacy k8s.gcr.io container image registry will be redirected to registry.k8s.io