Update Rust crate pdf-writer to 0.15.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
pdf-writer	dependencies	minor	0.14.0 → 0.15.0

---

Release Notes

typst/pdf-writer (pdf-writer)

v0.15.0: Version 0.15.0

Compare Source

• Added Settings struct with writing configuration
  • Added Chunk::{with_settings, with_settings_and_capacity}
  • Added Pdf::{with_settings, with_settings_and_capacity}
  • Added Content::{with_settings, with_settings_and_capacity}
• Added Content::reserve and Chunk::reserve
• Added Content::{len, as_bytes}
• Added Pdf::{finish_with_xref_stream, finish_with_xref_stream_and_filter}
• Added XRefFilter type
• The Primitive trait is now sealed (Breaking change)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.