Fix matrix-appservice-discord features list

[cloudrac3r]

On https://matrix.org/ecosystem/bridges/discord/, currently matrix-appservice-discord is listed as having some features that it actually doesn't.

It does not yet have support for reactions - some pull requests have been proposed but not merged

It does not yet have support for direct messaging as this checkbox is unticked in the readme.

It does not yet have support for Discord-to-Matrix replies - again some PRs have been proposed but not merged.

To fix this, the file should look like this:

[[bridges]]
name = "matrix-appservice-discord"
maintainer = "Matrix.org Foundation"
summary = "This project bridges Discord to Matrix via the Application Service API"
maturity = "Beta"
language = "TypeScript"
license = "Apache-2.0"
docs = "https://github.com/matrix-org/matrix-appservice-discord#end-user-documentation"
repo = "https://github.com/matrix-org/matrix-appservice-discord"
room = "#discord:matrix.org"
featured = true
privilege.platform = "Admin" # Free text
privilege.matrix = "Homeserver Admin" # Any of Homeserver Admin, Room Admin, None
[bridges.supports]
dm = false
channels = true
formatted_text = true
message_media = true
replies = false # maybe?
mentions = true
threads = false
redactions = true
editing = true
reactions = false
presence = true
typing_notifications = false