Fix typo

alterative -> alternative

Author: changeworld

articles/storage/blobs/storage-blob-copy-async-go.md

@@ -58,7 +58,7 @@ The following methods wrap the [Copy Blob](/rest/api/storageservices/copy-blob)
 
 ## Copy a blob from a source within Azure
 
-If you're copying a blob within the same storage account, the operation can complete synchronously. Access to the source blob can be authorized via Microsoft Entra ID (recommended), a shared access signature (SAS), or an account key. For an alterative synchronous copy operation, see [Copy a blob from a source object URL with Go](storage-blob-copy-url-go.md).
+If you're copying a blob within the same storage account, the operation can complete synchronously. Access to the source blob can be authorized via Microsoft Entra ID (recommended), a shared access signature (SAS), or an account key. For an alternative synchronous copy operation, see [Copy a blob from a source object URL with Go](storage-blob-copy-url-go.md).
 
 If the copy source is a blob in a different storage account, the operation can complete asynchronously. The source blob must either be public or authorized via SAS token. The SAS token needs to include the **Read ('r')** permission. To learn more about SAS tokens, see [Delegate access with shared access signatures](../common/storage-sas-overview.md).