Update docs/howto.md with single backticks

docs/howto.md

@@ -18,7 +18,7 @@ is formatted as https://discordapp.com/channels/``guildid``/``channelid``
   * ``npm run adminme -- -r '!AbcdefghijklmnopqR:example.com' -u '@Alice:example.com' -p '100'``
   * Run ``npm run adminme -- -h`` for usage.
 
-Please note that ``'!AbcdefghijklmnopqR:example.com'`` is the internal room id and will always begin with ``!``.
+Please note that `!AbcdefghijklmnopqR:example.com` is the internal room id and will always begin with `!`.
 You can find this internal id in the room settings in Riot.
 
 ### Migrate to postgres from sqlite