database/migrations: fix migration 07 for postgresql

database/migrations/07-guilds.sql

@@ -2,6 +2,6 @@ CREATE TABLE guild (
 	discord_id TEXT NOT NULL,
 	guild_id TEXT NOT NULL,
 	guild_name TEXT NOT NULL,
-	bridge INTEGER(1) DEFAULT FALSE,
+	bridge BOOLEAN DEFAULT FALSE,
 	PRIMARY KEY(discord_id, guild_id)
 );