Guard against other known limits

site/docs/advanced/flood.md

@@ -64,6 +64,13 @@ From the [Bot FAQ](https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-h
    Completely unrelated to bulk notifications or how many messages are sent in the group.
    And yet again, the auto-retry plugin will take care of this for you.
 
+There are a few other known limits there were revealed outside of the official Bot API documentation.
+For example, [it is known](https://t.me/tdlibchat/146123) that bots can only do up to 20 message edits in a minute per group chat.
+However, this is the exception, and we also have to assume that these limits may be changed in the future.
+Thus, this information does not affect how to program your bot.
+
+For instance, throttling your bot based on these number is still a bad idea:
+
 ## Throttling
 
 Some think that it is bad to run into rate limits.