increase delay in workaround for flaky unit test

Signed-off-by: Reuben Miller <[email protected]>

crates/extensions/tedge_mqtt_bridge/tests/bridge.rs

@@ -278,7 +278,7 @@ async fn bridge_reconnects_successfully_after_local_connection_interrupted() {
     // Current theory: If a sub-ack is not received, then the subscription
     // is not remembered by the client and not resubscribed after
     // a connection outage
-    sleep(Duration::from_millis(100)).await;
+    sleep(Duration::from_millis(500)).await;
 
     local_proxy.interrupt_connections();
     wait_until_health_status_is("up", &mut ev_local)