Update model_checkpoint.yaml for Lightning 2.1.0

[amorehead]

What does this PR do?

Updates model_checkpoint.yaml for Lightning 2.1.0.

Before submitting

• [x] Did you make sure title is self-explanatory and the description concisely explains the PR?
• [x] Did you make sure your PR does only one thing, instead of bundling different changes together?
• [x] Did you list all the breaking changes introduced by this pull request?
• [ ] Did you test your PR locally with pytest command?
• [ ] Did you run pre-commit hooks with pre-commit run -a command?

Did you have fun?

y

Make sure you had fun coding 🙃

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (bddbc24) 83.24% compared to head (6980a5d) 83.24%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #619   +/-   ##
=======================================
  Coverage   83.24%   83.24%           
=======================================
  Files          11       11           
  Lines         376      376           
=======================================
  Hits          313      313           
  Misses         63       63           

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