📖 Docs update quick-start.md use "kubectl -k apply"

[csantanapr]

Fixes #3499

[Kavinjsir]

LGTM 👍🏼

[camilamacedo86]

I think we should not merge this one,
See your error: error validating data: [apiVersion not set, kind not set]; if you choose to ignore these errors, turn validation off with --validate=false

You probably did not executed make manifests to properly generate the manifests.

[csantanapr]

Hi @camilamacedo86

I ran make manifests

The problem is that with using -f in kubectl apply it will process the two files as kubernetes manifest files, the kustomization.yaml is not a kubernets manifest is a kustomize manifest and you need to use kubectl -k not kubectl -f

you if you want to use -f then you need to specify the file kubectl -f config/samples/webapp_v1_guestbook.yaml

ls -l config/samples/ 
total 8
-rw------- 1 vscode vscode 124 Jul 21 17:40 kustomization.yaml
-rw------- 1 vscode vscode 361 Jul 21 17:40 webapp_v1_guestbook.yaml

This PR should be merge to use be able to process the directory that has a kustomize file

[camilamacedo86]

I see the error is with error: error validating "config/samples/kustomization.yaml":

/lgtm

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[camilamacedo86]

/test pull-kubebuilder-e2e-k8s-1-26-0