docs: add rtd to setup.cfg

Author: andrewthetechie

setup.cfg

@@ -13,7 +13,7 @@ license = MIT
 license_files = LICENSE
 keywords = pydantic, aioredis, ORM, asyncio
 project_urls = 
-	Documentation = https://github.com/andrewthetechie/pydantic-aioredis
+	Documentation = https://pydantic-aioredis.readthedocs.io/en/latest/
 	Source code = https://github.com/andrewthetechie/pydantic-aioredis
 	Issue tracker = https://github.com/andrewthetechie/pydantic-aioredis
 classifiers =