fix(readme): correct typos in README

[tushar743-ui]

What type of PR is this?
/kind bug

What this PR does / why we need it:
Fixes two typos in README.md:
Noting -> Note
scenairo -> scenario

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:
Simple documentation typo fixes, no functional changes.

Does this PR introduce a user-facing change?:
NONE

[kubeedge-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: tushar743-ui
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[kubeedge-bot]

Welcome @tushar743-ui! It looks like this is your first PR to kubeedge/edgemesh 🎉

[gemini-code-assist]

Code Review

This pull request fixes typos in the README.md file, specifically correcting "scenairo" to "scenario" and "Noting" to "Note". The reviewer suggested additional grammatical improvements in the background section to enhance readability, including changing "is build" to "is built" and "edge computer" to "edge computing".

[tushar743-ui]

Hi @kevin-wangzefeng, @Poorunga, just a gentle ping on this doc fix when you have a moment. I wanted to ensure this approach looks correct to you.
Thanks