Typo "CosmosDB account"→"Cosmos DB account" (Azure#22516)

https://learn.microsoft.com/en-us/powershell/module/az.cosmosdb/update-azcosmosdbaccount?view=azps-10.2.0
https://github.com/Azure/azure-powershell/blob/main/src/CosmosDB/CosmosDB/help/Update-AzCosmosDBAccount.md
#PingMSFTDocs

Author: hyoshioka0128

src/CosmosDB/CosmosDB/help/Update-AzCosmosDBAccount.md

@@ -55,7 +55,7 @@ Update-AzCosmosDBAccount -InputObject <PSDatabaseAccountGetResults> [-EnableAuto
 ```
 
 ## DESCRIPTION
-Update the properties of a CosmosDB account. Cannot update Account Regions simulataneously with other properties.
+Update the properties of a Cosmos DB account. Cannot update Account Regions simulataneously with other properties.
 
 ## EXAMPLES