Fix application run webhook method on readme (#3443)

README.rst

@@ -150,7 +150,7 @@ PTB can be installed with optional dependencies:
 * ``pip install python-telegram-bot[passport]`` installs the `cryptography>=3.0 <https://cryptography.io/en/stable>`_ library. Use this, if you want to use Telegram Passport related functionality.
 * ``pip install python-telegram-bot[socks]`` installs `httpx[socks] <https://www.python-httpx.org/#dependencies>`_. Use this, if you want to work behind a Socks5 server.
 * ``pip install python-telegram-bot[rate-limiter]`` installs `aiolimiter~=1.0.0 <https://aiolimiter.readthedocs.io/en/stable/>`_. Use this, if you want to use ``telegram.ext.AIORateLimiter``.
-* ``pip install python-telegram-bot[webhooks]`` installs the `tornado~=6.2 <https://www.tornadoweb.org/en/stable/>`_ library. Use this, if you want to use ``telegram.ext.Updater.start_webhook``/``telegram.ext.Application.start_webhook``.
+* ``pip install python-telegram-bot[webhooks]`` installs the `tornado~=6.2 <https://www.tornadoweb.org/en/stable/>`_ library. Use this, if you want to use ``telegram.ext.Updater.start_webhook``/``telegram.ext.Application.run_webhook``.
 * ``pip install python-telegram-bot[callback-data]`` installs the `cachetools~=5.2.0 <https://cachetools.readthedocs.io/en/latest/>`_ library. Use this, if you want to use `arbitrary callback_data <https://github.com/python-telegram-bot/python-telegram-bot/wiki/Arbitrary-callback_data>`_.
 * ``pip install python-telegram-bot[job-queue]`` installs the `APScheduler~=3.9.1 <https://apscheduler.readthedocs.io/en/3.x/>`_ library and enforces `pytz>=2018.6 <https://pypi.org/project/pytz/>`_, where ``pytz`` is a dependency of ``APScheduler``. Use this, if you want to use the ``telegram.ext.JobQueue``.