cloudvision: Update library to v1.21.1

Includes a fix for studio helpers where inputs with sizes over the grpc
message limit are not able to be handled properly due to API filtering

Change-Id: I745272f9c73a6ba446b51eaf4304bae9f456d9f2

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cloudvision"
-version = "1.21.0"
+version = "1.21.1"
 dynamic = ["dependencies", "optional-dependencies"]
 description = "A Python library for Arista's CloudVision APIs and Provisioning Action integrations."
 requires-python = ">=3.7.0"