Correct minor typos in readmes

[scarlettjlee]

No description provided.

[Copilot]

Pull Request Overview

This PR corrects spelling and grammatical errors in documentation files for the register-collection and matrix packages.

• Fixed typos and grammar issues in technical documentation
• Improved clarity and readability of existing content

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/dds/register-collection/README.md	Corrected spelling errors ('literaure' → 'literature', 'phsical' → 'physical', 'essenially' → 'essentially', 'concurreny' → 'concurrency', "it's" → "its")
packages/dds/matrix/README.md	Fixed grammatical errors ('conflict' → 'conflicts', 'documents' → 'document')

[github-actions]

🔗 No broken links found! ✅

Your attention to detail is admirable.

linkcheck output

> [email protected] ci:check-links /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test "npm run serve -- --no-open" 3000 check-links

1: starting server using command "npm run serve -- --no-open"
and when url "[ 'http://127.0.0.1:3000' ]" is responding with HTTP status code 200
running tests using command "npm run check-links"


> [email protected] serve
> docusaurus serve --no-open

[SUCCESS] Serving "build" directory at: http://localhost:3000/

> [email protected] check-links
> linkcheck http://localhost:3000 --skip-file skipped-urls.txt

Crawling...

Stats:
  249626 links
    1771 destination URLs
    2009 URLs ignored
       0 warnings
       0 errors