Cb-tumblebug: Apply updates from PR #799 for readme(KR) to readme(EN-WIP)

[seokho-son]

Thank you @Jayita10. Looks good to me !!

CB-Tumblebug welcomes improvements from all contributors, new and experienced!
We look forward to further contributions from you~! :)

Thank you @seokho-son :)
Just a suggestion, I think the same should be changed here also.

_Originally posted by @Jayita10 in https://github.com/cloud-barista/cb-tumblebug/issues/799#issuecomment-927856081_

[seokho-son]

This issue discovered by @Jayita10

We don't have to limit this issue for first-time-contributor only :)
So, I'd like to rely on @Jayita10. Please contribute ! :)

[seokho-son]

/assign @Jayita10

[seokho-son]

fixed by #806