Relax async-timeout version to >=4.0, <6.0 (#9695) (#9697)

Author: asvetlov

requirements/runtime-deps.in

@@ -3,7 +3,7 @@
 aiodns >= 3.2.0; sys_platform=="linux" or sys_platform=="darwin"
 aiohappyeyeballs >= 2.3.0
 aiosignal >= 1.1.2
-async-timeout >= 4.0, < 5.0 ; python_version < "3.11"
+async-timeout >= 4.0, < 6.0 ; python_version < "3.11"
 attrs >= 17.3.0
 Brotli; platform_python_implementation == 'CPython'
 brotlicffi; platform_python_implementation != 'CPython'

setup.cfg

@@ -53,7 +53,7 @@ include_package_data = True
 install_requires =
   aiohappyeyeballs >= 2.3.0
   aiosignal >= 1.1.2
-  async-timeout >= 4.0, < 5.0 ; python_version < "3.11"
+  async-timeout >= 4.0, < 6.0 ; python_version < "3.11"
   attrs >= 17.3.0
   frozenlist >= 1.1.1
   multidict >=4.5, < 7.0