docs: update demo app url

[yukinakanaka]

Fixes: #2309

Current demo app url doesn't work in an ARM environment. It needs to be updated by following cilium repository's update: cilium/cilium#31373.

The new url worked in my ARM environment.

$ uname -a
Linux lima-tetragon-dev 5.15.0-101-generic #111-Ubuntu SMP Wed Mar 6 18:01:01 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux

$ k create -f https://raw.githubusercontent.com/cilium/cilium/v1.15.3/examples/minikube/http-sw-app.yaml
service/deathstar created
deployment.apps/deathstar created
pod/tiefighter created
pod/xwing created

$ k get po
NAME                        READY   STATUS    RESTARTS   AGE
deathstar-b4b8ccfb5-kwz85   1/1     Running   0          12s
deathstar-b4b8ccfb5-z7pdj   1/1     Running   0          12s
tiefighter                  1/1     Running   0          12s
xwing                       1/1     Running   0          12s

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[mtardy]

It seems that the old version worked on my arm64 linux VM, but I thin it's just that I can run x86_64 thanks to the rosetta sharing of lima, so this is very specific to my setup and not generally aarch64 compatible. Thanks a lot, happy to update the deployment anyway!

[mtardy]

Can you sign-off the commit?

[yukinakanaka]

Thank you for your review! Oh, sorry I forgot sign-off. I amended it.

[mtardy]

Thank you for your review! Oh, sorry I forgot sign-off. I amended it.

perfect thanks!