Readd warning log details to clarify what option that the log refers to

Author: Mattias-Sehlstedt

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -7091,7 +7091,7 @@ public boolean convertPropertyToBoolean(String propertyKey) {
         } else if (booleanValue instanceof String) {
             result = Boolean.parseBoolean((String) booleanValue);
         } else {
-            LOGGER.warn("The value {} must be either boolean or string. Default to `false`.", propertyKey);
+            LOGGER.warn("The generator's option \"{}\" must be either boolean or string. Default to `false`.", propertyKey);
         }
         return result;
     }