Bump rails_admin from 3.1.2 to 3.1.4

Bumps [rails_admin](https://github.com/sferik/rails_admin) from 3.1.2 to 3.1.4.
- [Changelog](https://github.com/railsadminteam/rails_admin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sferik/rails_admin/compare/v3.1.2...v3.1.4)

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

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

Gemfile.lock

@@ -291,7 +291,7 @@ GEM
       timeout
     net-smtp (0.5.0)
       net-protocol
-    nio4r (2.7.0)
+    nio4r (2.7.3)
     nokogiri (1.16.7)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
@@ -346,7 +346,7 @@ GEM
     rails-i18n (7.0.9)
       i18n (>= 0.7, < 2)
       railties (>= 6.0.0, < 8)
-    rails_admin (3.1.2)
+    rails_admin (3.1.4)
       activemodel-serializers-xml (>= 1.0)
       kaminari (>= 0.14, < 2.0)
       nested_form (~> 0.3)