Update README.rst

Author: asvetlov

README.rst

@@ -260,7 +260,7 @@ Changelog
 ~~~~~~~~~~~~~~~~~~~
 - Fixes a bug that prevents async Hypothesis tests from working without explicit ``asyncio`` marker when ``--asyncio-mode=auto`` is set. `#258 <https://github.com/pytest-dev/pytest-asyncio/issues/258>`_
 - Fixed a bug that closes the default event loop if the loop doesn't exist `#257 <https://github.com/pytest-dev/pytest-asyncio/issues/257>`_
-- Relax ``asyncio_mode`` type definition; it allows to support pytest 5.4+. `#262 <https://github.com/pytest-dev/pytest-asyncio/issues/262>`_
+- Relax ``asyncio_mode`` type definition; it allows to support pytest 6.1+. `#262 <https://github.com/pytest-dev/pytest-asyncio/issues/262>`_
 
 0.17.0 (22-01-13)
 ~~~~~~~~~~~~~~~~~~~