Update ruby/setup-ruby action to v1.285.0 (#75)

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

Author: renovate[bot]

.github/workflows/build-site.yml

@@ -20,7 +20,7 @@ jobs:
           fetch-depth: 1
           persist-credentials: false
       - name: Set up Ruby
-        uses: ruby/setup-ruby@80740b3b13bf9857e28854481ca95a84e78a2bdf # v1.284.0
+        uses: ruby/setup-ruby@e69dcf3ded5967f30d7ef595704928d91cdae930 # v1.285.0
         with:
           bundler-cache: true
       - name: Run Jekyll