Apply template update: [ruby] Update all Bundler dependencies (2026-04-04) (#1481)

Source: mockdeep/Rails-Template#1392

Co-authored-by: Template Bot <template-bot@users.noreply.github.com>

Author: rails-template-sync[bot]

Gemfile.lock

@@ -232,7 +232,7 @@ GEM
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     ostruct (0.6.3)
-    parallel (1.27.0)
+    parallel (1.28.0)
     parser (3.3.11.1)
       ast (~> 2.4.1)
       racc