Update python-telegram-bot requirement from ~=20.5 to ~=21.0

Updates the requirements on [python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot) to permit the latest version.
- [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@v20.5...v21.0.1)

---
updated-dependencies:
- dependency-name: python-telegram-bot
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -9,7 +9,7 @@ memory-tempfile~=2.2.3
 numpy>=1.22.4
 Pillow==10.1.0
 pyoxipng~=9.0.0
-python-telegram-bot~=20.5
+python-telegram-bot~=21.0
 requests~=2.31.0
 rlottie_python~=1.3.3
 signalstickers-client~=3.3.0