cloudvision: Bump library version to 1.21.0

Includes:
- Ability to set tags in log requests through ctx
- IP utilities for cvlib for studios
- Various API defintion updates

Change-Id: I480d3db5c33a4c8bb3115079a850f563743a3da2

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cloudvision"
-version = "1.20.0"
+version = "1.21.0"
 dynamic = ["dependencies", "optional-dependencies"]
 description = "A Python library for Arista's CloudVision APIs and Provisioning Action integrations."
 requires-python = ">=3.7.0"