Update matrix-vs-telegram.md

[Self-Perfection]

Add some missing information regarding Telegram capabilities.

[Self-Perfection]

I miss comparison of bot capabilities. Bots is one of the facets that is really cool in Telegram. I wonder if bots in matrix can include buttons below messages or support inline mode.

[austinhuang0131]

Bots are regular user accounts on Matrix. (An "app service" allows a program to mass register accounts automatically, but it by itself is not a bot; it simply controls "bots" = user accounts.)

buttons below messages

No, but it can be achieved by other means:

• Links can be included in the text message. If you insist, you can make a HTML table to make it look like a button...
• Since a reaction can be in free-form text, it can be used as a button. The bot can then listen to the reaction. Note that only some clients support creating free-form reactions (like Nheko); others (like Element) don't allow you to propose a new free-form reaction, but do allow you to respond using an existing reaction on the message. But the difference in support is purely a client UI issue; the protocol doesn't care.

support inline mode

No. But on the other hand, Element has browser-like widgets...