Update dependency async-timeout to v4.0.3

Author: renovate[bot]

requirements.txt

@@ -2,7 +2,7 @@ aiodns==3.0.0
 aiofiles==0.8.0; python_version >= "3.6" and python_version < "4.0"
 aiohttp==3.8.6; python_version >= "3.6"
 aiosignal==1.3.1; python_version >= "3.6"
-async-timeout==4.0.2; python_version >= "3.6"
+async-timeout==4.0.3; python_version >= "3.6"
 asyncio==3.4.3
 attrs==21.4.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 beautifulsoup4==4.12.2; python_full_version > "3.0.0"