Bump ruby/setup-ruby from 1.258.0 to 1.263.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.258.0 to 1.263.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@3fee676...0481980)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.263.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-    - uses: ruby/setup-ruby@3fee6763234110473bd57dd4595c5199fce2c510 # v1.258.0
+    - uses: ruby/setup-ruby@0481980f17b760ef6bca5e8c55809102a0af1e5a # v1.263.0
       with:
         bundler-cache: true
     - run: GOVUK_DOCKER_DIR=. make test-ci