Update dependency pymdown-extensions to v10.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pymdown-extensions	==10.0.1 -> ==10.3

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Release Notes

facelessuser/pymdown-extensions (pymdown-extensions)

### [`v10.3`](https://togithub.com/facelessuser/pymdown-extensions/releases/tag/10.3) [Compare Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.2.1...10.3) #### 10.3 - **NEW**: Officially support Python 3.12. - **NEW**: Drop Python 3.7 support. ### [`v10.2.1`](https://togithub.com/facelessuser/pymdown-extensions/releases/tag/10.2.1) [Compare Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.2...10.2.1) ##### 10.2.1 - **FIX**: Tabbed: Fix regression. ### [`v10.2`](https://togithub.com/facelessuser/pymdown-extensions/releases/tag/10.2) [Compare Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.1.0...10.2) ##### 10.2 - **NEW**: Highlight: Add new `stripnl` option to configure Pygments' default handling of stripping leading and and trailing new lines from code blocks. Mainly affects fenced code blocks. - **FIX**: SuperFences: Fix issue where when SuperFences attempts to test if a placeholder is its own, it can throw an exception. ### [`v10.1`](https://togithub.com/facelessuser/pymdown-extensions/compare/10.0.1...10.1.0) [Compare Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.0.1...10.1.0)

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