message: Update minimum required runtime version message
diff: @@ -30,7 +30,7 @@ namespace AutoRest.Ruby.Azure
  /// <summary>
  /// Gets the usage instructions for the code generator.
  /// </summary>
  - public override string UsageInstructions => @"The ""gem 'ms_rest_azure' ~> 0.6"" is required for working with generated code.";
  + public override string UsageInstructions => @"The ""gem 'ms_rest_azure' ~> 0.7"" is required for working with generated code.";
  /// <summary>
  /// Generates Ruby code for Azure service client.
  