doc: fix list of examples to include the nanoparticle example

[cadenmyers13]

@sbillinge ready for review/merge

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.63%. Comparing base (f8c6f32) to head (1cb979b).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #97   +/-   ##
=======================================
  Coverage   93.63%   93.63%           
=======================================
  Files           4        4           
  Lines         220      220           
=======================================
  Hits          206      206           
  Misses         14       14           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[sbillinge]

This doesn't seem to add this example. Should the title of the PR be something like "doc: fix list of examples to include the nanoparticle example"?

[sbillinge]

I merged, assuming the answer to my question was "yes" but if the example is actually missing please let me know.

[cadenmyers13]

@sbillinge yes youre right. Just needed to be listed.