Update python-telegram-bot requirement from ~=20.6 to ~=20.7 (#23)

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@v20.6...v20.7)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -1,4 +1,4 @@
-python-telegram-bot~=20.6
+python-telegram-bot~=20.7
 panflute~=2.5.2
 gql[aiohttp]~=3.5.0
 pydantic~=2.5.2