fix(deps): update dependency graphql to v15.7.2

Author: renovate-bot

package-lock.json

@@ -51,7 +51,7 @@
     "email-validator": "2.0.4",
     "express": "4.17.1",
     "finnish-ssn": "2.0.4",
-    "graphql": "15.5.3",
+    "graphql": "15.7.2",
     "graphql-depth-limit": "1.1.0",
     "graphql-scalars": "1.10.1",
     "graphql-subscriptions": "1.2.1",