Bump govuk_admin_template from 6.11.0 to 7.0.0

Bumps [govuk_admin_template](https://github.com/alphagov/govuk_admin_template) from 6.11.0 to 7.0.0.
- [Changelog](https://github.com/alphagov/govuk_admin_template/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_admin_template@v6.11.0...v7.0.0)

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

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

Gemfile.lock

@@ -130,7 +130,7 @@ GEM
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
     coderay (1.1.3)
-    concurrent-ruby (1.3.1)
+    concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     crack (1.0.0)
       bigdecimal
@@ -185,7 +185,7 @@ GEM
     google-protobuf (3.25.3-x86_64-linux)
     googleapis-common-protos-types (1.14.0)
       google-protobuf (~> 3.18)
-    govuk_admin_template (6.11.0)
+    govuk_admin_template (7.0.0)
       bootstrap-sass (~> 3.4)
       jquery-rails (~> 4.3)
       plek (>= 2.1)