Bump rubocop-govuk from 4.7.0 to 4.8.0

Bumps [rubocop-govuk](https://github.com/alphagov/rubocop-govuk) from 4.7.0 to 4.8.0.
- [Release notes](https://github.com/alphagov/rubocop-govuk/releases)
- [Changelog](https://github.com/alphagov/rubocop-govuk/blob/main/CHANGELOG.md)
- [Commits](alphagov/rubocop-govuk@v4.7.0...v4.8.0)

---
updated-dependencies:
- dependency-name: rubocop-govuk
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -275,7 +275,7 @@ GEM
     rainbow (3.1.1)
     raindrops (0.20.0)
     rake (13.0.6)
-    regexp_parser (2.5.0)
+    regexp_parser (2.6.0)
     request_store (1.5.1)
       rack (>= 1.4)
     rest-client (2.1.0)
@@ -287,32 +287,32 @@ GEM
     rouge (4.0.0)
     rss (0.2.9)
       rexml
-    rubocop (1.35.0)
+    rubocop (1.37.1)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.20.1, < 2.0)
+      rubocop-ast (>= 1.23.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.21.0)
+    rubocop-ast (1.23.0)
       parser (>= 3.1.1.0)
-    rubocop-govuk (4.7.0)
-      rubocop (= 1.35.0)
-      rubocop-ast (= 1.21.0)
-      rubocop-rails (= 2.15.2)
+    rubocop-govuk (4.8.0)
+      rubocop (= 1.37.1)
+      rubocop-ast (= 1.23.0)
+      rubocop-rails (= 2.17.1)
       rubocop-rake (= 0.6.0)
-      rubocop-rspec (= 2.12.1)
-    rubocop-rails (2.15.2)
+      rubocop-rspec (= 2.14.1)
+    rubocop-rails (2.17.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 1.7.0, < 2.0)
+      rubocop (>= 1.33.0, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.12.1)
-      rubocop (~> 1.31)
+    rubocop-rspec (2.14.1)
+      rubocop (~> 1.33)
     ruby-progressbar (1.11.0)
     rubyzip (2.3.2)
     sassc (2.4.0)
@@ -369,7 +369,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)
-    unicode-display_width (2.2.0)
+    unicode-display_width (2.3.0)
     unicorn (6.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)