fix: docs some minors in README

[amber-moe]

Summary about this PR

Issue Number: close #1254

Tests Check List

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Changelog

• New Feature
• Bug Fix
• Performance Improvement
• Build/Testing/CI/CD
• Documentation
• Not for changelog (changelog entry is not required)

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features

[CLAassistant]

All committers have signed the CLA.

[mergify]

This pull request's title should follow requirements next. @Amber1990Zhang please check it 👇.

Valid format:

fix(vc): fix sth..... (#3306)
  ^         ^---------^  ^----^
  |         |            |
  |         +            +-> you issue id.
  |         |
  |         +-> Summary in present tense.
  |
  +-------> Type: feat, fix, docs, workflow, style, refactor, test, website, chore

Valid types:

• feat: new feature for stonedb
• fix: bug fix for stonedb
• docs: changes to the documentation
• workflow: ci/cd in .github
• perf: Changes to improve code performance
• refactor: refactoring production code, eg. renaming a variable
• style: formatting, missing semi colons, etc; no production code change
• test: adding missing tests, refactoring tests; no production code change
• website
• chore: updating grunt tasks etc; no production code change

[mergify]

Thanks for the contribution!
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Please review the labels and make any necessary changes.

[hustjieke]

Thanks for you pr @Amber1990Zhang
PTAL @Nliver

[Nliver]

Thank you very much for correcting the documentation @Amber1990Zhang.
Of course, I sincerely hope that you can work with us in the future to develop StoneDB Community Edition. You know, writing code is probably more fun than fixing punctuation, right? Come and join us, we are waiting for you ~

[Nliver]

LGTM

[hustjieke]

LGTM