Updated model card for OLMo2

[andyvu923]

What does this PR do?

#36979

This PR updates the model card for OLMo2 using the template provided in #36979.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case. [Community contributions] Model cards #36979

Who can review?

@stevhliu please let me know if any changes need to be made, thank you!

[stevhliu]

Nice job, very clean. Thanks for your contribution! 🤗

[andyvu923]

@stevhliu Suggestions added. Thank you!

[stevhliu]

Thanks so much, just a couple more minor things and then we can merge :)

[andyvu923]

@stevhliu cache_implementation="static" added to output and code block indented in notes as requested. Should be good to go!

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.