build(deps): bump pgvector from 0.3.3 to 0.3.4

Bumps [pgvector](https://github.com/pgvector/pgvector-rust) from 0.3.3 to 0.3.4.
- [Changelog](https://github.com/pgvector/pgvector-rust/blob/master/CHANGELOG.md)
- [Commits](pgvector/pgvector-rust@v0.3.3...v0.3.4)

---
updated-dependencies:
- dependency-name: pgvector
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>