apacheGH-41903: [CI][GLib] Use the latest Ruby to use OpenSSL 3 (apac…

…he#42001)

### Rationale for this change

Old Ruby ships OpenSSL 1 but googld-cloud-cpp requires OpenSSL 3. We need to use Ruby that ships OpenSSL 3.

### What changes are included in this PR?

Use the latest Ruby.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.
* GitHub Issue: apache#41903

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Raúl Cumplido <raulcumplido@gmail.com>

.github/workflows/ruby.yml

@@ -197,9 +197,7 @@ jobs:
  mingw-n-bits:
  - 64
  ruby-version:
- # TODO: Use the latest Ruby again when we fix GH-39130.
- # - ruby
- - "3.1"
+ - ruby
  env:
  ARROW_BUILD_STATIC: OFF
  ARROW_BUILD_TESTS: OFF