Update README.md

[dknauss]

Many spelling corrections and other improvements to correctness and clarity.

What?

Corrects spelling and grammar errors. Improves sentence clarity.

Why?

There are many spelling errors and grammatical mistakes in the document.

How?

Corrects spelling and grammar errors. Improves sentence clarity.

Testing Instructions

Compare with current version. (https://developer.wordpress.org/block-editor/reference-guides/packages/packages-dataviews/)

Testing Instructions for Keyboard

Screenshots or screencast

Before	After

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: dknauss <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions]

👋 Thanks for your first Pull Request and for helping build the future of Gutenberg and WordPress, @dknauss! In case you missed it, we'd love to have you join us in our Slack community.

If you want to learn more about WordPress development in general, check out the Core Handbook full of helpful information.

[oandregal]

Thanks, Dan!

[dknauss]

No problem, thanks @oandregal! This is actually not my first PR for WP and Gutenberg, but I am still pretty new to this. :-)