Bump govuk_design_system_formbuilder from 2.7.5 to 4.1.0

Bumps [govuk_design_system_formbuilder](https://github.com/x-govuk/govuk-form-builder) from 2.7.5 to 4.1.0.
- [Release notes](https://github.com/x-govuk/govuk-form-builder/releases)
- [Commits](x-govuk/govuk-form-builder@v2.7.5...v4.1.0)

---
updated-dependencies:
- dependency-name: govuk_design_system_formbuilder
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Gemfile.lock

@@ -115,7 +115,6 @@ GEM
     crass (1.0.6)
     daemons (1.4.1)
     date (3.3.3)
-    deep_merge (1.2.1)
     delayed_job (4.1.11)
       activesupport (>= 3.0, < 8.0)
     delayed_job_active_record (4.1.7)
@@ -189,11 +188,11 @@ GEM
       html-attributes-utils (~> 1.0.0, >= 1.0.0)
       pagy (~> 6.0)
       view_component (~> 3.0.0)
-    govuk_design_system_formbuilder (2.7.5)
-      actionview (>= 6.0)
-      activemodel (>= 6.0)
-      activesupport (>= 6.0)
-      deep_merge (~> 1.2.1)
+    govuk_design_system_formbuilder (4.1.0)
+      actionview (>= 6.1)
+      activemodel (>= 6.1)
+      activesupport (>= 6.1)
+      html-attributes-utils (~> 1)
     hashdiff (1.0.1)
     hashie (5.0.0)
     html-attributes-utils (1.0.0)
@@ -250,7 +249,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.2)
     mini_portile2 (2.8.2)
-    minitest (5.18.0)
+    minitest (5.18.1)
     msgpack (1.6.0)
     multi_json (1.15.0)
     multi_xml (0.6.0)
@@ -338,8 +337,9 @@ GEM
       bundler (>= 1.15.0)
       railties (= 6.1.7.3)
       sprockets-rails (>= 2.0.0)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
+    rails-dom-testing (2.1.1)
+      activesupport (>= 5.0.0)
+      minitest
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.6.0)
       loofah (~> 2.21)