Update ruby/setup-ruby action to v1.239.0 (#597)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -51,7 +51,7 @@ jobs:
           docker compose up -d || (sleep 5 && docker compose up -d)
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@e34163cd15f4bb403dcd72d98e295997e6a55798 # v1.238.0
+        uses: ruby/setup-ruby@84684c07c1965536eb4802c8daf1a77968df0cb1 # v1.239.0
         with:
           ruby-version: ${{matrix.ruby}}
           bundler-cache: true
@@ -86,7 +86,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@e34163cd15f4bb403dcd72d98e295997e6a55798 # v1.238.0
+        uses: ruby/setup-ruby@84684c07c1965536eb4802c8daf1a77968df0cb1 # v1.239.0
         with:
           ruby-version: ${{matrix.ruby}}
           bundler-cache: false