Bump python-telegram-bot from 20.6 to 20.7 #476

Job	Run time
build_linux (ubuntu-20.04, 3.9)	13m 41s
build_linux (ubuntu-20.04, 3.10)	13m 24s
build_linux_online	40m 50s
build_windows (windows-latest, 3.9)	15m 44s
build_macos (macos-latest, 3.9)	20m 19s
build_linux (ubuntu-20.04, 3.11)	12m 51s
build_windows (windows-latest, 3.10)	14m 54s
build_macos (macos-latest, 3.10)	21m 33s
build_linux (ubuntu-22.04, 3.9)	11m 37s
build_windows (windows-latest, 3.11)	17m 39s
docs_check	24s
build_macos (macos-latest, 3.11)	19m 19s
build_linux (ubuntu-22.04, 3.10)	11m 37s
build_linux (ubuntu-22.04, 3.11)	11m 3s
mypy_version_check	10s
pre-commit	1m 26s
deploy	0s
deploy_arm	0s
notify-complete	2s
	3h 46m 33s

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