Bump python-telegram-bot from 20.6 to 20.7

Bumps [python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot) from 20.6 to 20.7.
- [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](https://github.com/python-telegram-bot/python-telegram-bot/compare/v20.6...v20.7)

---
updated-dependencies:
- dependency-name: python-telegram-bot
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -6,7 +6,7 @@ ccxt==4.1.66
 cryptography==41.0.7
 aiohttp==3.9.1
 SQLAlchemy==2.0.23
-python-telegram-bot==20.6
+python-telegram-bot==20.7
 # can't be hard-pinned due to telegram-bot pinning httpx with ~
 httpx>=0.24.1
 arrow==1.3.0