Update supported az cli version to 2.26 (#223)

Co-authored-by: stas <statis@microsoft.com>

Author: stishkin

cli/raft_sdk/raft_deploy.py

@@ -984,7 +984,7 @@ def update_deployment_context(self):
             json.dump(defaults, d, indent=4)
 
     def test_az_version(self):
-        supported_versions = ['2.20.0', '2.21.0']
+        supported_versions = ['2.25.0', '2.26.0']
         # az sometimes reports the version with an asterisk.
         # Perhaps when a new version of the CLI is available.
         tested_az_cli_versions = (