build(deps): bump contentful-migration from 4.17.2 to 4.17.3

Bumps [contentful-migration](https://github.com/contentful/contentful-migration) from 4.17.2 to 4.17.3.
- [Release notes](https://github.com/contentful/contentful-migration/releases)
- [Changelog](https://github.com/contentful/contentful-migration/blob/master/CHANGELOG.md)
- [Commits](contentful/contentful-migration@v4.17.2...v4.17.3)

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

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