Chore: Typo fixed in README.md

[SusheelThapa]

Please check if what you want to add to awesome-go list meets quality standards before sending pull request. Thanks!

This PR fix the typo that was present in README.md file.

plugable > pluggable
compability > compatibility
unmarshaling > unmarshalling
convinient > convenient
wirtten > written
utitlity > utility
fo > of
vaccum > vacuum

[github-actions]

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• godoc.org or pkg.go.dev
• goreportcard.com
• coverage

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