Bump thumbor from 7.4.0 to 7.4.3

Bumps [thumbor](https://github.com/thumbor/thumbor) from 7.4.0 to 7.4.3.
- [Release notes](https://github.com/thumbor/thumbor/releases)
- [Changelog](https://github.com/thumbor/thumbor/blob/master/CHANGELOG)
- [Commits](thumbor/thumbor@7.4.0...7.4.3)

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

Signed-off-by: dependabot[bot] <support@github.com>