dep: Update serde_derive since it no longer ships with binary blobs.

[11Kilobytes]

See serde-rs/serde#2590 for more details.

Describe your changes. Use imperative present tense.

For confirmation that serde_derive no longer ships with blobs, note that the deblobbing project has been deprecated for this reason.

Checklist

• Add documentation to docs/config.adoc
  • Yes or N/A: deps shouldn't need this.
• Add example and basic docs to cfg_samples/kanata.kbd
  • Yes or N/A: ditto
• Update error messages
  • Yes or N/A: same
• Added tests, or did manual testing
  • Yes: I ran cargo test and the code compiled so I assume whatever proc macros are necessary in the project are working.