Update exercises/baffling-birthdays/canonical-data.json

Co-authored-by: Anastasios Chatzialexiou <[email protected]>

Author: ErikSchierboom

exercises/baffling-birthdays/canonical-data.json

@@ -170,7 +170,7 @@
       "input": {
         "groupSize": 70
       },
-      "expected": 99.9
+      "expected": 99.915958
     }
   ]
 }