fix(deps): update dependency llama-index to v0.11.22

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
llama-index (source)	0.11.21 -> 0.11.22

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Release Notes

run-llama/llama_index (llama-index)

### [`v0.11.22`](https://redirect.github.com/run-llama/llama_index/blob/HEAD/CHANGELOG.md#llama-index-core-01122) [Compare Source](https://redirect.github.com/run-llama/llama_index/compare/v0.11.21...v0.11.22) - bring back support for prompt templates in context chat engines ([#​16821](https://redirect.github.com/run-llama/llama_index/issues/16821)) - Fixed the JSON Format of Generated Sub-Question (double curly brackets) ([#​16820](https://redirect.github.com/run-llama/llama_index/issues/16820)) - markdown splitter improve metadata ([#​16789](https://redirect.github.com/run-llama/llama_index/issues/16789)) - fix empty index + generation synthesizer ([#​16785](https://redirect.github.com/run-llama/llama_index/issues/16785))

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[sweep-ai[bot]]

Hey @renovate[bot], here is an example of how you can ask me to improve this pull request:

@sweep Add unit tests for the context chat engine to verify that prompt templates are correctly supported after the fix mentioned in the changelog (issue #16821).

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