docs: add example "Multi Format Schema Object Example with Avro"

spec/asyncapi.md

@@ -1814,6 +1814,29 @@ Name | Allowed values | Notes
 [RAML 1.0 data type](https://github.com/raml-org/raml-spec/blob/master/versions/raml-10/raml-10.md/) | `application/raml+yaml;version=1.0` |
 [Protocol Buffers](https://protobuf.dev/) | `application/vnd.google.protobuf;version=2`, `application/vnd.google.protobuf;version=3` |
 
+##### Multi Format Schema Object Examples
+
+###### Multi Format Schema Object Example with Avro
+
+```yaml
+channels:
+ example:
+ messages:
+ myMessage:
+ payload:
+ schemaFormat: 'application/vnd.apache.avro;version=1.9.0'
+ schema:
+ type: record
+ name: User
+ namespace: com.company
+ doc: User information
+ fields:
+ - name: displayName
+ type: string
+ - name: age
+ type: int
+```
+
 #### <a name="schemaObject"></a>Schema Object
 
 The Schema Object allows the definition of input and output data types.