fix(deps): update dependency pikepdf to v9.4.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pikepdf (changelog)	9.4.0 -> 9.4.1

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Release Notes

pikepdf/pikepdf (pikepdf)

### [`v9.4.1`](https://redirect.github.com/pikepdf/pikepdf/compare/v9.4.0...v9.4.1) [Compare Source](https://redirect.github.com/pikepdf/pikepdf/compare/v9.4.0...v9.4.1)

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Configuration

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