Bump govuk_personalisation from 0.14.0 to 0.15.0

Bumps [govuk_personalisation](https://github.com/alphagov/govuk_personalisation) from 0.14.0 to 0.15.0.
- [Changelog](https://github.com/alphagov/govuk_personalisation/blob/main/CHANGELOG.md)
- [Commits](alphagov/govuk_personalisation@v0.14.0...v0.15.0)

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

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

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
       sentry-rails (~> 5.3)
       sentry-ruby (~> 5.3)
       statsd-ruby (~> 1.5)
-    govuk_personalisation (0.14.0)
+    govuk_personalisation (0.15.0)
       plek (>= 1.9.0)
       rails (>= 6, < 8)
     govuk_publishing_components (35.15.3)