fix collect interval

examples/self-diagnostics/src/main.rs

@@ -136,9 +136,9 @@ async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
     rx.recv().expect("Could not receive from channel.");
     println!("Got Ctrl-C, Doing shutdown and existing.");
 
-    // Metrics are exported by default every 30 seconds when using stdout exporter,
+    // Metrics are exported by default every 1 seconds when using stdout exporter,
     // however shutting down the MeterProvider here instantly flushes
-    // the metrics, instead of waiting for the 30 sec interval.
+    // the metrics, instead of waiting for the 1 sec interval.
     meter_provider.shutdown()?;
     // shutdown again to trigger error message.
     meter_provider.shutdown()?;