Log Message:
misc/ruby-parallel: update to 1.26.3

1.26.0 (2024-08-08)

* Merge pull request #348 from y-yagi/use_available_processor_count:
  Use cgroups aware processor count by default

1.26.1 (2024-08-09)

* Revert "Merge pull request #348 from y-yagi/use_available_processor_count

1.26.2 (2024-08-11)

* Revert "Revert "Merge pull request #348 from
  y-yagi/use_available_processor_count"

1.26.3 (2024-08-17)

* Merge pull request #351 from y-yagi/ensure_not_to_use_old_concurrent-ruby:
  Ensure not to use old concurrent-ruby