feat: add Zitadel to SSO providers list in meta.json

- Updated the meta.json file to include Zitadel as a supported SSO provider alongside existing options, enhancing the configuration capabilities for enterprise users.

Author: Siumauricio

apps/docs/content/docs/core/enterprise/sso/meta.json

@@ -4,6 +4,7 @@
 		"auth0",
 		"azure",
 		"keycloak",
-		"okta"
+		"okta",
+		"zitadel"
 	]
 }