Merge pull request #6526 from NHSDigital/dependabot/bundler/bundler-815790764d

Bump the bundler group across 1 directory with 2 updates

Author: thomasleese

Gemfile.lock

@@ -611,7 +611,7 @@ GEM
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
-    rack-session (2.1.1)
+    rack-session (2.1.2)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.2.0)