feat(python): update python docker tag to v3.12.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
python		patch	3.12.5 -> 3.12.6
python	dependencies	patch	==3.12.5 -> ==3.12.6
python	final	patch	3.12.5-slim -> 3.12.6-slim
python	stage	patch	3.12.5-slim -> 3.12.6-slim

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Release Notes

containerbase/python-prebuild (python)

### [`v3.12.6`](https://redirect.github.com/containerbase/python-prebuild/releases/tag/3.12.6) [Compare Source](https://redirect.github.com/containerbase/python-prebuild/compare/3.12.5...3.12.6) ##### Bug Fixes - **deps:** update dependency python to v3.12.6

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Configuration

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