fix(deps): update dependency pypdf to v3.15.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pypdf (changelog)	3.15.0 -> 3.15.1

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Release Notes

py-pdf/pypdf (pypdf)

v3.15.1

Compare Source

Performance Improvements (PI)

• optimize _decode_png_prediction (#​2068)

Bug Fixes (BUG)

• Fix incorrect tm_matrix in call to visitor_text (#​2060)
• Writing German characters into form fields (#​2047)
• Prevent stall when accessing image in corrupted pdf (#​2081)
• append() fails when articles do not have /T (#​2080)

Robustness (ROB)

• Cope with xref not followed by separator (#​2083)

Full Changelog

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Configuration

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