Bump python-telegram-bot from 12.8 to 13.1

Bumps [python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot) from 12.8 to 13.1.
- [Release notes](https://github.com/python-telegram-bot/python-telegram-bot/releases)
- [Changelog](https://github.com/python-telegram-bot/python-telegram-bot/blob/master/CHANGES.rst)
- [Commits](python-telegram-bot/python-telegram-bot@v12.8...v13.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -1 +1 @@
-python-telegram-bot==12.8
+python-telegram-bot==13.1