build: update Python Library Version to 1.21.3

AzureFunctionsPython · AzureFunctionsPython · commit 02c502ee1418 · 2024-10-09T16:07:13.000Z
diff --git a/azure/functions/__init__.py b/azure/functions/__init__.py
@@ -98,4 +98,4 @@
     'BlobSource'
 )
 
-__version__ = '1.21.1'
+__version__ = '1.21.3'
