Publish updates to validation code and STAC notebook

[robbibt]

This PR updates the validation, STAC and animation notebooks to their latest versions.

Also minor changes to the readme

[github-actions]

For full integration test results, refer to the Tests directory README.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 57.14286% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 65.5%. Comparing base (72577ec) to head (29dfd87).
Report is 117 commits behind head on main.

❗ Current head 29dfd87 differs from pull request most recent head b15d94c. Consider uploading reports for the commit b15d94c to get more accurate results

Files	Patch %	Lines
intertidal/validation.py	66.6%	4 Missing ⚠️
intertidal/utils.py	0.0%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main     #83     +/-   ##
=======================================
+ Coverage   61.4%   65.5%   +4.1%     
=======================================
  Files          7       8      +1     
  Lines        568     714    +146     
=======================================
+ Hits         349     468    +119     
- Misses       219     246     +27     

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[erialC-P]

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