fix: add readme explanation about ajv coerceTypes configuration

Author: gal-cohen-payu-gpo

README.md

@@ -160,7 +160,7 @@ Arguments, options and response are the same as for the `buildSchemaSync` method
 
 - Objects - it is important to set any objects with the property `type: object` inside your swagger file, although it isn't a must in the Swagger (OpenAPI) spec in order to validate it accurately with [ajv](https://www.npmjs.com/package/ajv) it must be marked as `object`
 - Response validator does not support readOnly attribute
-
+- The Ajv flag `coerceTypes: "array"` enables type coercion for fields defined as arrays in the schema. It will attempt to parse values into arrays when possible (e.g., `1` → `[1]`, `"[1,2,3]"` → `[1,2,3]`).
 ## Open api 3 - known issues
 - supporting inheritance with discriminator , only if the ancestor object is the discriminator.
 - The discriminator supports in the inheritance chain stop when getting to a child with no discriminator (a leaf in the inheritance tree), meaning a leaf can't have a field which starts a new inheritance tree.