logs command in doc should be more general to execute

[lianghao208]

example: https://github.com/kserve/website/blob/main/docs/get_started/first_isvc.md?plain=1#L200

kubectl logs load-test8b58n-rgfxr -n kserve-test

Different users will generate different jobs and pods name, we should make it more general to execute.

[lianghao208]

/assign