Bump ice_cube from 0.16.3 to 0.16.4 in /back

Bumps [ice_cube](https://github.com/seejohnrun/ice_cube) from 0.16.3 to 0.16.4.
- [Release notes](https://github.com/seejohnrun/ice_cube/releases)
- [Changelog](https://github.com/ice-cube-ruby/ice_cube/blob/master/CHANGELOG.md)
- [Commits](ice-cube-ruby/ice_cube@v0.16.3...v0.16.4)

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

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

back/Gemfile.lock

@@ -620,7 +620,7 @@ GEM
       socksify
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    ice_cube (0.16.3)
+    ice_cube (0.16.4)
     image_processing (1.12.2)
       mini_magick (>= 4.9.5, < 5)
       ruby-vips (>= 2.0.17, < 3)