Changed Pascals to Pascal's for the Exercise name. (#3744)

Author: BethanyG

config.json

@@ -1554,7 +1554,7 @@
       },
       {
         "slug": "pascals-triangle",
-        "name": "Pascals Triangle",
+        "name": "Pascal's Triangle",
         "uuid": "e1e1c7d7-c1d9-4027-b90d-fad573182419",
         "practices": ["recursion"],
         "prerequisites": [