⬆️ Bump duckduckgo-search from 3.9.11 to 6.4.1

Bumps [duckduckgo-search](https://github.com/deedy5/duckduckgo_search) from 3.9.11 to 6.4.1.
- [Release notes](https://github.com/deedy5/duckduckgo_search/releases)
- [Commits](deedy5/duckduckgo_search@v3.9.11...v6.4.1)

---
updated-dependencies:
- dependency-name: duckduckgo-search
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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