Bump ruby/setup-ruby from 1.245.0 to 1.248.0 (#43)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.245.0 to 1.248.0.
- [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...a9bfc2e)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.248.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
           - 3.4.1
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651
+      - uses: ruby/setup-ruby@a9bfc2ecf3dd40734a9418f89a7e9d484c32b990
         with:
           ruby-version: ${{ matrix.ruby }}
       - run: gem install bundler --version 2.6.3 --no-document