misc/py-litellm: update to 1.24.6

Changelog:

• https://github.com/BerriAI/litellm/releases/tag/v1.24.1
• https://github.com/BerriAI/litellm/releases/tag/v1.24.3
• https://github.com/BerriAI/litellm/releases/tag/v1.24.5
• https://github.com/BerriAI/litellm/releases/tag/v1.24.6

Reported by: Repology