Provide an example for azureblob-sdk backend

Storage-backend-examples.md

@@ -12,6 +12,23 @@ jclouds.credential=yyyyyyyyyyyyy
 jclouds.endpoint=https://xxx.blob.core.windows.net
 ```
 
+### Azure Blob SDK - Managed Identity
+
+This backend provides similar functionality as the `azureblob` backend but is implemented using the [Microsoft SDK](https://learn.microsoft.com/en-us/java/api/overview/azure/storage?view=azure-java-stable). It supports multiple authentication options, including managed identities.
+
+If both the `jclouds.identity` and `jclouds.credential` options are empty strings, the [DefaultAzureCredential](https://learn.microsoft.com/en-us/java/api/com.azure.identity.defaultazurecredential?view=azure-java-stable) is used for authentication. Setting these options will disable the attempt to authenticate with managed identities and will authenticate using a static key instead.
+
+```
+s3proxy.endpoint=http://0.0.0.0:8080
+s3proxy.authorization=aws-v2-or-v4
+s3proxy.identity=local-identity
+s3proxy.credential=local-credential
+jclouds.provider=azureblob-sdk
+jclouds.endpoint=https://xxx.blob.core.windows.net
+jclouds.identity=
+jclouds.credential=
+```
+
 ### Backblaze B2
 
 ```