chore(deps): update dependency mkdocs-pymdownx-material-extras to v2.5.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mkdocs-pymdownx-material-extras	2.5.5 -> 2.5.6

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Release Notes

facelessuser/mkdocs_pymdownx_material_extras (mkdocs-pymdownx-material-extras)

### [`v2.5.6`](https://togithub.com/facelessuser/mkdocs_pymdownx_material_extras/compare/2.5.5...2.5.6) [Compare Source](https://togithub.com/facelessuser/mkdocs_pymdownx_material_extras/compare/2.5.5...2.5.6)

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