Add details on blocking data using JSON Schema

Adding a quick warning message about the type of connection mode thats supported when looking to block data with JSON Schema.

Author: prigiattiperrut

src/protocols/tracking-plan/create.md

@@ -174,6 +174,9 @@ To edit the common JSON schema using the Public API, you'll need to add your new
 > info "Specifying data type"
 > Property or trait data type should adhere to the [data types defined by JSON schema](https://json-schema.org/understanding-json-schema/reference/type.html){:target="_blank”}. Data type names must be lower-cased as specified in JSON schema. Datetime properties should be represented as a `string` type with [`format` keyword](https://json-schema.org/understanding-json-schema/reference/string.html#format){:target="_blank”} (for example: "format": "date-time").
 
+> info "Blocking data"
+> JSON schema violation event blocking is ONLY supported in cloud-mode Destinations. See [here](https://segment.com/docs/protocols/enforce/schema-configuration/){:target="_blank”} for more information on blocking data.
+
 ### Extend the Tracking Plan
 Some customers prefer to manage the Tracking Plan with outside tools and resources. See the [APIs and extensions](/docs/protocols/apis-and-extensions/) section to learn more.