Update dependency pymdown-extensions to v10.5

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pymdown-extensions	==10.4 -> ==10.5

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Release Notes

facelessuser/pymdown-extensions (pymdown-extensions)

### [`v10.5`](https://togithub.com/facelessuser/pymdown-extensions/releases/tag/10.5) [Compare Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.4...10.5) #### 10.5 - **NEW**: Blocks: Admonitions and Details now allow configuring custom block classes and default titles. - **FIX**: Keys: Ensure that Keys does not parse base64 encoded URLs.

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