Replace all Replicate granite 3.0 with 3.1

[esnible]

This fixes problems with Replicate returning Error during 'replicate/ibm-granite/granite-3.0-8b-instruct' model call: litellm.UnprocessableEntityError: ReplicateException - {"title":"Version disabled","detail":"This deployment is currently disabled:\n- This deployment has been disabled in its settings.","status":422}

This fixes Granite 3.1 so that it generates prompts as expected.

This PR introduces some new problems that will need to be fixed here or in a follow-up.

• With this fix applied, the 9-react.pdl example gets the correct answer, although it fails with a new error after that.
• With this fix applied, examples/weather/weather.pdl fails with a JSON decoding error.

I started investigating the new errors. Probably they reflect places the example prompts don't produce the expected output. Unfortunately, while testing, I started getting 402 Payment Required from Replicate even though I had an API key.

[vazirim]

Could you please remove the word replicate from line 697? Thanks!