Update chat actions

[Bibo-Joshi]

Found out by accident that chatAction.upload/record_audio has been replaced by voice somewhere between 11/2020 and 12/2020. Kudos @RenshouSorinozuka for making me find this :D

the audio-things still work because of this: https://github.com/tdlib/telegram-bot-api/blob/bf371b21b97c4c8d0b2e2646db05c654cb05480e/telegram-bot-api/Client.cpp#L4850 but backward compatibility is undocumented. I pinged botsupport asking them to at least document the change/announce somewhere, so I'd wait with mergen a bit to give them a change to update the docs, which we then could properly copy.

Also I didn't find a good way to add a deprecation warning to constants … Maybe someone has an idea? Then again, maybe it's not necessary.

Checklist for PRs

• Added .. versionadded:: version, .. versionchanged:: version or .. deprecated:: version to the docstrings for user facing changes (for methods/class descriptions, arguments and attributes)
• Created new or adapted existing unit tests
• Added myself alphabetically to AUTHORS.rst (optional)

If the PR contains API changes (otherwise, you can delete this passage)

• If relevant:

  • Added new constants at telegram.constants and shortcuts to them as class variables
  • Added new handlers for new update types
  • Added new filters for new message (sub)types
  • Added or updated documentation for the changed class(es) and/or method(s)
  • Updated the Bot API version number in all places: README.rst and README_RAW.rst (including the badge), as well as telegram.constants.BOT_API_VERSION

[starry-shivam]

Looks good!

[harshil21]

maybe it's not necessary.

Don't think it's needed for now.

[Bibo-Joshi]

Reply from botsupport:

That was always an alias to upload_voice, never was a separate thing and, therefore, didn't have any effect. Hence was simplified in the docs.

Merging.