Merge pull request #3657 from nhsuk/dependabot/bundler/bundler-b051ec43b1

Author: thomasleese

Gemfile.lock

@@ -442,7 +442,7 @@ GEM
       activesupport (>= 3.0.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (3.1.15)
+    rack (3.1.16)
     rack-oauth2 (2.2.1)
       activesupport
       attr_required