repo: drop support for python39

pyavd_utils requires 3_10+ for it to be installable

Change-Id: I885f87ece65528734697fa0e24763e9f3073489d

Author: cianmcgrath

pyproject.toml

@@ -7,7 +7,7 @@ name = "cloudvision"
 version = "1.26.4"
 dynamic = ["dependencies", "optional-dependencies"]
 description = "A Python library for Arista's CloudVision APIs and Provisioning Action integrations."
-requires-python = ">=3.9.0"
+requires-python = ">=3.10.0"
 readme = "README.md"
 maintainers = [{ name = "Support", email = "support@arista.com" }]
 classifiers = [