Update api-management-api-import-restrictions.md

server templating from openapi v3.0 not supported by APIM

Author: roquems

articles/api-management/api-management-api-import-restrictions.md

@@ -147,6 +147,7 @@ The following fields are included in either [OpenAPI version 3.0.x](https://swag
 | **PathItem** | <ul><li>`trace`</li><li>`servers`</li></ul> |
 | **Operation** | <ul><li>`externalDocs`</li><li>`callbacks`</li><li>`security`</li><li>`servers`</li></ul> |
 | **Parameter** | <ul><li>`allowEmptyValue`</li><li>`style`</li><li>`explode`</li><li>`allowReserved`</li></ul> |
+| **Server templating** | <ul><li>`API Server and Base URL`</li></ul> |
 
 ## OpenAPI import, update, and export mechanisms