fix(deps): update dependency llama-index-llms-openai to ^0.6.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
llama-index-llms-openai	^0.5.0 → ^0.6.0

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

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The artifact failure details are included below:

File name: poetry.lock

Updating dependencies
Resolving dependencies...


Because no versions of llama-index match >0.13.0,<0.13.1 || >0.13.1,<0.13.2 || >0.13.2,<0.13.3 || >0.13.3,<0.13.4 || >0.13.4,<0.13.5 || >0.13.5,<0.13.6 || >0.13.6,<0.14.0
 and llama-index (0.13.0) depends on llama-index-llms-openai (>=0.5.0,<0.6), llama-index (>=0.13.0,<0.13.1 || >0.13.1,<0.13.2 || >0.13.2,<0.13.3 || >0.13.3,<0.13.4 || >0.13.4,<0.13.5 || >0.13.5,<0.13.6 || >0.13.6,<0.14.0) requires llama-index-llms-openai (>=0.5.0,<0.6).
And because llama-index (0.13.1) depends on llama-index-llms-openai (>=0.5.0,<0.6)
 and llama-index (0.13.3) depends on llama-index-llms-openai (>=0.5.0,<0.6), llama-index (>=0.13.0,<0.13.2 || >0.13.2,<0.13.4 || >0.13.4,<0.13.5 || >0.13.5,<0.13.6 || >0.13.6,<0.14.0) requires llama-index-llms-openai (>=0.5.0,<0.6).
And because llama-index (0.13.4) depends on llama-index-llms-openai (>=0.5.0,<0.6)
 and llama-index (0.13.5) depends on llama-index-llms-openai (>=0.5.0,<0.6), llama-index (>=0.13.0,<0.13.2 || >0.13.2,<0.13.6 || >0.13.6,<0.14.0) requires llama-index-llms-openai (>=0.5.0,<0.6).
And because llama-index (0.13.6) depends on llama-index-llms-openai (>=0.5.0,<0.6)
 and llama-index (0.13.2) depends on llama-index-llms-openai (>=0.5.0,<0.6), llama-index (>=0.13.0,<0.14.0) requires llama-index-llms-openai (>=0.5.0,<0.6).
So, because mit-learn depends on both llama-index (^0.13.0) and llama-index-llms-openai (^0.6.0), version solving failed.