Bump govuk-frontend from 5.5.0 to 5.6.0

Bumps [govuk-frontend](https://github.com/alphagov/govuk-frontend) from 5.5.0 to 5.6.0.
- [Release notes](https://github.com/alphagov/govuk-frontend/releases)
- [Changelog](https://github.com/alphagov/govuk-frontend/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk-frontend@v5.5.0...v5.6.0)

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

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

Author: dependabot[bot]

package.json

@@ -9,7 +9,7 @@
   },
   "dependencies": {
     "esbuild": "^0.23.0",
-    "govuk-frontend": "^5.5.0",
+    "govuk-frontend": "^5.6.0",
     "sass": "^1.77.8"
   },
   "scripts": {

yarn.lock

@@ -1236,10 +1236,10 @@ gopd@^1.0.1:
   dependencies:
     get-intrinsic "^1.1.3"
 
-govuk-frontend@^5.5.0:
-  version "5.5.0"
-  resolved "https://registry.yarnpkg.com/govuk-frontend/-/govuk-frontend-5.5.0.tgz#dfb2426788dbf570ef7d2742983bc54e68f17f34"
-  integrity sha512-lNSHCOzgk6LfgelcdtJxTLK1BX/cpjCUyEB3LnzliD9o9YQckNMsbj5+jSOs2RFy6XBJ/DJqxj2TKfjBCuzpyA==
+govuk-frontend@^5.6.0:
+  version "5.6.0"
+  resolved "https://registry.yarnpkg.com/govuk-frontend/-/govuk-frontend-5.6.0.tgz#8c0975f0d825ec7192bcfe64e3e97ef3dfa7dea1"
+  integrity sha512-yNA4bL7i7mNrg36wPNZ3RctHo9mjl82Phs8MWs1lwovxJuQ4ogEo/XWn2uB1HxkXNqgMlW4wnd0iiKgRMfxYfw==
 
 graceful-fs@^4.1.15:
   version "4.2.10"