fix(model_runtime): fix wrong max_tokens for Claude 3.5 Haiku on Amazon Bedrock

[mazyu36]

Checklist:

Important

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• Please open an issue before creating a PR or link to an existing issue
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Description

I've added Claude 3.5 Haiku on Amazon Bedrock (#10265).
But max_token is wrong. It was set to 4096, but it should have been 8192.
I apologize for not checking thoroughly.

https://docs.anthropic.com/en/docs/about-claude/models#model-comparison-table

Fixes

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B