ci: Weekly lockfile generation CI job (#2966)

Author: sl0thentr0py

.github/workflows/sentry_ruby_test.yml

@@ -57,6 +57,7 @@ jobs:
               rubyopt: "--enable-frozen-string-literal --debug=frozen-string-literal"
           - ruby_version: 3.2
             rack_version: 3.0
+            redis_rb_version: 4.0
           - ruby_version: 3.3
             rack_version: 3.1
             redis_rb_version: 5.3

.github/workflows/tests.yml

@@ -13,6 +13,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  # needs to be kept in sync with the matrix in update_lockfiles.yml
   ruby-versions:
     uses: ruby/actions/.github/workflows/ruby_versions.yml@6d15c16f6259d657961bcdccf2598d3d53e90635
     with: