Increase test_diff_management test total runtime

Its currently producing too much false alarms which
can block new pull requests as well as make it harder to find
issues in new pull requests.

roles/translator/src/lib/downstream_sv1/diff_management.rs

@@ -320,7 +320,7 @@ mod test {
     #[test]
     fn test_diff_management() {
         let expected_shares_per_minute = 1000.0;
-        let total_run_time = std::time::Duration::from_secs(11);
+        let total_run_time = std::time::Duration::from_secs(30);
         let initial_nominal_hashrate = measure_hashrate(5);
         let target = match roles_logic_sv2::utils::hash_rate_to_target(
             initial_nominal_hashrate,
@@ -342,13 +342,13 @@ mod test {
         }
 
         let calculated_share_per_min = count as f32 / (elapsed.as_secs_f32() / 60.0);
-        // This is the error margin for a confidence of 99% given the expect number of shares per
+        // This is the error margin for a confidence of 99.99...% given the expect number of shares per
         // minute TODO the review the math under it
         let error_margin = get_error(expected_shares_per_minute);
         let error = (calculated_share_per_min - expected_shares_per_minute as f32).abs();
         assert!(
             error <= error_margin as f32,
-            "Calculated shares per minute are outside the 99% confidence interval. Error: {:?}, Error margin: {:?}, {:?}", error, error_margin,calculated_share_per_min
+            "Calculated shares per minute are outside the 99.99...% confidence interval. Error: {:?}, Error margin: {:?}, {:?}", error, error_margin,calculated_share_per_min
         );
     }