updated RF stress config

Signed-off-by: Joe Batt <joe.batt@answerdigital.com>

Author: JoeBatt1989

performance-testing/k6/dicom/config/peakConfig.json

@@ -41,6 +41,6 @@
         "vus": 6,
         "iterations": 30,
         "maxDuration": "60m",
-        "pacing": 630
+        "pacing": 60
     }
 }