Steps to reproduce

1. Go to a page in the docs, e.g. this one: https://python-telegram-bot.readthedocs.io/en/stable/telegram.ext.filters.html?highlight=caption#telegram.ext.filters.Filters.caption_regex

2. Click "Edit on GitHub" at the top right.

3. Youˈll end up at https://github.com/python-telegram-bot/python-telegram-bot/blob/ccedd3a87d5d7c4ea2a651eba4e9a8bcfba5faba/docs/source/telegram.ext.filters.rst

Expected behaviour

You will end up somewhere where you can edit the actual text (e.g. if you found a spelling mistake).

Actual behaviour

You end up on a template page (?) that apparently fetches the actual page content from somewhere else (where exactly is not obvious).

Configuration

Operating System: Irrelevant

Version of Python, python-telegram-bot & dependencies: Irrelevant