Update bundler non-major dependencies to v6.8.0

Author: renovate[bot]

Gemfile.lock

@@ -239,7 +239,7 @@ GEM
       nio4r (~> 2.0)
     racc (1.8.1)
     rack (3.1.18)
-    rack-attack (6.7.0)
+    rack-attack (6.8.0)
       rack (>= 1.0, < 4)
     rack-session (2.1.1)
       base64 (>= 0.1.0)