Improve workflow rule to use RUBY_VERSION_NEXT in foss scheduled pipeline

.gitlab-ci.yml

@@ -119,6 +119,10 @@ workflow:
         <<: [*default-ruby-variables, *default-branch-pipeline-failure-variables]
         CRYSTALBALL: "true"
         PIPELINE_NAME: 'Scheduled Ruby $RUBY_VERSION $CI_COMMIT_BRANCH branch'
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH && $CI_PIPELINE_SOURCE == "schedule" && $BUILD_WITH_NEXT_RUBY_VERSION == "true"'
+      variables:
+        <<: *next-ruby-variables
+        PIPELINE_NAME: 'Scheduled Ruby $RUBY_VERSION $CI_COMMIT_BRANCH branch'
     - if: '$CI_COMMIT_BRANCH == "ruby3_2" && $CI_PIPELINE_SOURCE == "schedule"'
       variables:
         <<: *next-ruby-variables

.gitlab/ci/version.yml

@@ -14,7 +14,7 @@ variables:
   NODE_VERSION: "20.12"
   OS_VERSION: "bookworm"
   RUBY_VERSION_DEFAULT: "3.1.5"
-  RUBY_VERSION_NEXT: "3.2.5" # Keep this value consistent with the `[Nightly] Caches update for Ruby 3.2` gitlab-foss pipeline schedule setting. See https://gitlab.com/gitlab-org/gitlab/-/issues/488386#note_2115955499
+  RUBY_VERSION_NEXT: "3.2.5"
   RUBYGEMS_VERSION: "3.4"
   RUST_VERSION: "1.73"
   UBI_VERSION: "8.6"