fix type in channel.ts

packages/backend/src/server/api/stream/channels/channel.ts

@@ -30,7 +30,7 @@ class ChannelChannel extends Channel {
 	}
 
 	@bindThis
-	public async init(params: any) {
+	public async init(params: JsonObject) {
 		if (typeof params.channelId !== 'string') return;
 		this.channelId = params.channelId;
 		this.withFiles = !!(params.withFiles ?? false);