Bump defra_ruby_area from 2.0.3 to 2.1.0

Bumps [defra_ruby_area](https://github.com/DEFRA/defra-ruby-area) from 2.0.3 to 2.1.0.
- [Release notes](https://github.com/DEFRA/defra-ruby-area/releases)
- [Changelog](https://github.com/DEFRA/defra-ruby-area/blob/main/CHANGELOG.md)
- [Commits](https://github.com/DEFRA/defra-ruby-area/commits)

---
updated-dependencies:
- dependency-name: defra_ruby_area
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -170,7 +170,7 @@ GEM
       rest-client (~> 2.0)
     defra_ruby_alert (2.2.1)
       airbrake
-    defra_ruby_area (2.0.3)
+    defra_ruby_area (2.1.0)
       nokogiri (>= 1.13.2)
       rest-client (~> 2.0)
     defra_ruby_email (1.3.0)
@@ -190,8 +190,7 @@ GEM
     dibber (0.7.0)
     diff-lcs (1.5.0)
     docile (1.4.0)
-    domain_name (0.5.20190701)
-      unf (>= 0.0.5, < 1.0.0)
+    domain_name (0.6.20231109)
     dotenv (2.8.1)
     dotenv-rails (2.8.1)
       dotenv (= 2.8.1)
@@ -257,9 +256,9 @@ GEM
     marcel (1.0.2)
     matrix (0.4.2)
     method_source (1.0.0)
-    mime-types (3.4.1)
+    mime-types (3.5.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2023.0218.1)
+    mime-types-data (3.2023.1003)
     mini_mime (1.1.5)
     mini_portile2 (2.8.5)
     minitest (5.20.0)
@@ -442,9 +441,6 @@ GEM
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     uk_postcode (2.1.8)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.8.2)
     unicode-display_width (2.4.2)
     uniform_notifier (1.16.0)
     validates_email_format_of (1.7.2)