docs: made cron job under construction

Author: raphael-goetz

README.md

@@ -12,7 +12,7 @@ See: [Installation]()
 | HTTP | 🚧 |
 | MQTT | 📝 |
 | AMQP | 📝 |
-| Cron-Jobs | 📝 |
+| Cron-Jobs | 🚧 |
 
 **Legend:**
 - ✅ Done: Fully implemented and ready to use

adapter/cron/src/main.rs

@@ -73,7 +73,7 @@ impl Server<CronConfig> for Cron {
 
     async fn run(&mut self, ctx: &ServerContext<CronConfig>) -> anyhow::Result<()> {
         let expression = "0 * * * * *";
-        let schedule = Schedule::from_str(expression).expect("Failed to parse CRON expression");
+        let schedule = Schedule::from_str(expression)?;
         let pattern = "*.*.CRON.*";
 
         loop {