Update dependency python-rapidjson to v1.15

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
python-rapidjson	==1.14 -> ==1.15

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Release Notes

python-rapidjson/python-rapidjson (python-rapidjson)

### [`v1.15`](https://togithub.com/python-rapidjson/python-rapidjson/compare/v1.14...v1.15) [Compare Source](https://togithub.com/python-rapidjson/python-rapidjson/compare/v1.14...v1.15)

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Configuration

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