Update Guidelines.md

Adding missing newline

Author: artificial-paul

azure/Guidelines.md

@@ -41,6 +41,7 @@ These guidelines apply to Azure service teams implementing _data plane_ APIs. Th
 - Sustainable & versionable via clear API contracts with 2 requirements:
   1. Customer workloads must never break due to a service change
   2. Customers can adopt a version without requiring code changes
+
 Technology and software is constantly changing and evolving, and as such, this is intended to be a living document. [Open an issue](https://github.com/microsoft/api-guidelines/issues/new/choose) to suggest a change or propose a new idea. Please read the [Considerations for Service Design](./ConsiderationsForServiceDesign.md) for an introduction to the topic of API design for Azure services. *For an existing GA'd service, don't change/break its existing API; instead, leverage these concepts for future APIs while prioritizing consistency within your existing service.*
 
 *Note: If you are creating a management plane (ARM) API, please refer to the [Azure Resource Manager Resource Provider Contract](https://github.com/Azure/azure-resource-manager-rpc).*