Updated readme and history files for cosmos db

src/cosmosdb-preview/HISTORY.rst

@@ -7,6 +7,7 @@ Release History
 * Add 'source_backup_location' parameter to 'cosmosdb restore' command
 * Add support for performing in-account restore of deleted databases and graphs in a Gremlin account.
 * Add support for performing in-account restore of deleted tables in a Table account.
+* Add `--enable-burst-capacity` parameter for create/update database account.
 
 ++++++
 0.23.0

src/cosmosdb-preview/README.md

@@ -12,6 +12,8 @@ This package provides commands to
 - Create/Delete a cosmosdb materialized views builder service resource
 - Provision and update database account with Continuous 7 days backup mode
 - Retrieve and redistribute throughput at physical partition level.
+- Create a new Azure Cosmos DB database account with burst capacity.
+- Update an Azure Cosmos DB database account to enable/disable burst capacity.
 
 ## How to use ##
 
@@ -263,6 +265,24 @@ az cosmosdb service delete \
     --name "MaterializedViewsBuilder" \
 ```
 
+#### Create a new CosmosDB burst capacity enabled Account ####
+
+```sh
+az cosmosdb create \
+    --resource-group "my-rg" \
+    --name "my-db-account" \
+    --enable-burst-capacity true
+```
+
+#### Enable burst capacity on an existing CosmosDB Account ####
+
+```sh
+az cosmosdb update \
+    --resource-group "my-rg" \
+    --name "my-db-account" \
+    --enable-burst-capacity true
+```
+
 #### Restore a deleted database within same account for a Sql database account ####
 
 ```sh