Settings: Set Style/StringLiterals to double_quotes

vendor/hound/config/style_guides/ruby.yml

@@ -101,7 +101,7 @@ Style/StringLiterals:
   Description: Checks if uses of quotes match the configured preference.
   StyleGuide: https://github.com/bbatsov/ruby-style-guide#consistent-string-literals
   Enabled: true
-  EnforcedStyle: single_quotes
+  EnforcedStyle: double_quotes
   SupportedStyles:
   - single_quotes
   - double_quotes