Bump countries from 5.3.0 to 5.3.1 (#1316)

Bumps [countries](https://github.com/countries/countries) from 5.3.0 to 5.3.1.
- [Release notes](https://github.com/countries/countries/releases)
- [Changelog](https://github.com/countries/countries/blob/master/CHANGELOG.md)
- [Commits](countries/countries@v5.3.0...v5.3.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: PaulDoyle-DEFRA <97455399+PaulDoyle-DEFRA@users.noreply.github.com>

Gemfile.lock

@@ -119,7 +119,7 @@ GEM
     concurrent-ruby (1.2.0)
     console (1.13.1)
       fiber-local
-    countries (5.3.0)
+    countries (5.3.1)
       unaccent (~> 0.3)
     crack (0.4.5)
       rexml