docs: add link to tree undo redo blog post

[jenn-le]

adds link to quick start guide

[github-actions[bot]]

🔗 No broken links found! ✅

Your attention to detail is admirable.

linkcheck output

> fluidframework-docs@0.25.0 ci:linkcheck /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test ci:start 1313 linkcheck:full

1: starting server using command "npm run ci:start"
and when url "[ 'http://127.0.0.1:1313' ]" is responding with HTTP status code 200
running tests using command "npm run linkcheck:full"

> fluidframework-docs@0.25.0 ci:start
> http-server ./public --port 1313 --silent

> fluidframework-docs@0.25.0 linkcheck:full
> npm run linkcheck:fast -- --external

> fluidframework-docs@0.25.0 linkcheck:fast
> linkcheck http://localhost:1313 --skip-file skipped-urls.txt --external

Crawling...

Stats:
  403776 links
    3142 destination URLs
       2 URLs ignored
       0 warnings
       0 errors