fix: correctly initializes the completion time of the copy properties of a blob (#34559)

Author: hector-sab

sdk/storage/azure-storage-blob/CHANGELOG.md

@@ -14,6 +14,7 @@ Python 3.12.
 - Fixed an issue where authentication errors could raise `AttributeError` instead of `ClientAuthenticationError` when
 using async OAuth credentials.
 - Fixed an typing issue which incorrectly typed the `readinto` API. The correct input type is `IO[bytes]`.
+- Fixed a typo in the initialization of `completion_time` for the `CopyProperties` model.
 
 ## 12.19.0 (2023-11-07)
 

sdk/storage/azure-storage-blob/azure/storage/blob/_models.py

@@ -651,7 +651,7 @@ def __init__(self, **kwargs):
         self.source = kwargs.get('x-ms-copy-source')
         self.status = get_enum_value(kwargs.get('x-ms-copy-status'))
         self.progress = kwargs.get('x-ms-copy-progress')
-        self.completion_time = kwargs.get('x-ms-copy-completion_time')
+        self.completion_time = kwargs.get('x-ms-copy-completion-time')
         self.status_description = kwargs.get('x-ms-copy-status-description')
         self.incremental_copy = kwargs.get('x-ms-incremental-copy')
         self.destination_snapshot = kwargs.get('x-ms-copy-destination-snapshot')