updated cheraw rates for increased length, M7.4

stable-crust/fault/CO/Cheraw/usgs/rupture-set.json

@@ -7,8 +7,8 @@
       "weight": 0.5,
       "value": {
         "type": "SINGLE",
-        "m": 7.0,
-        "rate": 0.00020419
+        "m": 7.4,
+        "rate": 0.00005129
       }
     },
     {
@@ -16,10 +16,10 @@
       "weight": 0.5,
       "value": {
         "type": "GR",
-        "a": 2.39162,
+        "a": 2.01032,
         "b": 0.95,
         "mMin": 6.5,
-        "mMax": 7.0,
+        "mMax": 7.4,
         "Δm": 0.1
       }
     }