Updating ruby version for CI

Author: brownpl

.github/workflows/ruby.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6.5
+        ruby-version: 2.6.6
 
     - name: Setup ElasticSearch
       uses: getong/[email protected]