Bump govuk_app_config from 1.20.1 to 1.20.2

Bumps [govuk_app_config](https://github.com/alphagov/govuk_app_config) from 1.20.1 to 1.20.2.
- [Release notes](https://github.com/alphagov/govuk_app_config/releases)
- [Changelog](https://github.com/alphagov/govuk_app_config/blob/master/CHANGELOG.md)
- [Commits](alphagov/govuk_app_config@v1.20.1...v1.20.2)

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

Gemfile.lock

@@ -108,10 +108,10 @@ GEM
       rubocop-rspec (~> 1.28)
       scss_lint
     govuk_ab_testing (2.4.1)
-    govuk_app_config (1.20.1)
+    govuk_app_config (1.20.2)
       aws-xray-sdk (~> 0.10.0)
       logstasher (>= 1.2.2, < 1.4.0)
-      sentry-raven (>= 2.7.1, < 2.10.0)
+      sentry-raven (>= 2.7.1, < 2.12.0)
       statsd-ruby (~> 1.4.0)
       unicorn (>= 5.4, < 5.6)
     govuk_frontend_toolkit (8.2.0)
@@ -296,7 +296,7 @@ GEM
     selenium-webdriver (3.142.3)
       childprocess (>= 0.5, < 2.0)
       rubyzip (~> 1.2, >= 1.2.2)
-    sentry-raven (2.9.0)
+    sentry-raven (2.11.0)
       faraday (>= 0.7.6, < 1.0)
     slimmer (13.1.0)
       activesupport