Bump ruby/setup-ruby from 1.245.0 to 1.247.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.245.0 to 1.247.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@a4effe4...4727905)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.247.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/rubyci-alerts.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
-      - uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651 # v1.245.0
+      - uses: ruby/setup-ruby@472790540115ce5bd69d399a020189a8c87d641f # v1.247.0
         with:
           ruby-version: 2.7
 

.github/workflows/rubyci-screenshot.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
-      - uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651 # v1.245.0
+      - uses: ruby/setup-ruby@472790540115ce5bd69d399a020189a8c87d641f # v1.247.0
         with:
           ruby-version: 2.7