adding highlights and breaking changes

Signed-off-by: Vishwanath Hiremath <[email protected]>

docs/release-notes/v0.37.0.md

@@ -10,9 +10,26 @@ If you're new to Radius, check out our website, [radapp.io](https://radapp.io),
 
 ## Highlights
 
+### Radius is merged with the official Bicep
+Previously Radius used a fork of the Bicep to author and deploy Radius and AWS types. With 0.37 release we have merged our extensibility updates with the upstream and are deprecating the temporary fork of Bicep. To use Radius features with the official Bicep compiler, you need to create a [`bicepconfig.json`]((https://docs.radapp.io/guides/tooling/bicepconfig/overview/)) with the extensions to author and deploy Radius and AWS types. Please checkout the breaking changes section for detailed guidance.
+
+### Radius AWS Cloud provider supports IAM Roles for Service Accounts (IRSA)
+You can now configure your AWS cloud provider to use AWS federated identity (IRSA) to deploy and manage AWS resources. With this support, infrastructure operators are not burdened with the rotation of the credentials anymore. More information on [how to configure the AWS IRSA](https://docs.radapp.io/guides/operations/providers/aws-provider/howto-aws-provider-irsa/)
+
+### Test Improvements
+We separated the cloud tests and non-cloud tests in our functional  test workflows to improve the test verification process for contributors. In the new workflow the non-cloud test workflows will trigger automatically when pull requests are submitted, while tests using cloud resources will need approval from approvers/maintainers to be triggered. We also fixed an issue with `magpiego` image failing for MacOS+M1 chip users by publishing a multi-architectural image.
+
 ## Breaking changes
 
-N/A
+- Radius merge to official Bicep introduces some breaking changes. To use Radius features with the official Bicep compiler please do the following:
+    1. Create a bicepconfig.json with the extensions to author and deploy Radius and AWS types. More information here.
+    2. Update the import statements in the existing bicep files
+        - import radius as radius should become extension radius to use Radius types
+        - import aws as aws should become extension aws to use AWS types
+        - import kubernetes as kubernetes {} should become extension kubernetes with {} as kubernetes to use Kubernetes types
+    3. If you have Radius-Bicep extension installed, please disable and install the official bicep extension. More details here.
+
+- AWS IRSA support introduces some breaking changes to rad credential register aws CLI command. With the additional identity support, rad credential register aws is now rad credential register aws access-key to register the IAM access-key and rad credential register aws to register the AWS IAM Roles for Service Accounts(IRSA).
 
 ## New contributors