avroserializer pins its dependency, which makes regression testing a … (Azure#20735)

…bit iffy

@swathipil This will resolve your nightly failure. Still not understanding the specific repro I'm seeing when I run this thing locally though.

Author: scbedd

scripts/devops_tasks/git_helper.py

@@ -23,7 +23,7 @@
     'azure-cosmos': '3.2.0',
     'azure-servicebus': '0.50.3',
     'azure-eventgrid': '1.3.0',
-    'azure-schemaregistry-avroserializer': '1.0.0b1',
+    'azure-schemaregistry-avroserializer': '1.0.0b2',
     'azure-storage-blob-changefeed' : '12.0.0b2',
     'azure-storage-file-datalake': '12.2.0b1',
     'azure-communication-identity': '1.0.0',