Log Message:
py-pdf: update to 4.1.0.

## Version 4.1.0, 2024-03-03

Generating name objects (`NameObject`) without a leading slash
is considered deprecated now. Previously, just a plain warning
would be logged, leading to possibly invalid PDF files. According
to our deprecation policy, this will log a *DeprecationWarning*
for now.

### New Features (ENH)
- Add get_pages_from_field  (#2494)
- Add reattach_fields function (#2480)
- Automatic access to pointed object for IndirectObject (#2464)

### Bug Fixes (BUG)
- Missing error on name without leading / (#2387)
- encode_pdfdocencoding() always returns bytes (#2440)
- BI in text content identified as image tag (#2459)

### Robustness (ROB)
- Missing basefont entry in type 3 font (#2469)

### Documentation (DOC)
- Improve lossless compression example (#2488)
- Amend robustness documentation (#2479)

### Developer Experience (DEV)
- Fix changelog for UTF-8 characters (#2462)

### Maintenance (MAINT)
- Add _get_page_number_from_indirect in writer (#2493)
- Remove user assignment for feature requests (#2483)
- Remove reference to old 2.0.0 branch (#2482)

### Testing (TST)
- Fix benchmark failures (#2481)
- Broken test due to expired test file URL (#2468)
- Resolve file naming conflict in test_iss1767 (#2445)