Update contributors.json

Author: bbfrederick

.maint/contributors.json

@@ -39,6 +39,13 @@
     "name": "Finc, Karolina",
     "orcid": "0000-0002-0157-030X"
   },
+  {
+    "affiliation": [
+      "McLean Hospital Brain Imaging Center, MA, USA",
+      "Consolidated Department of Psychiatry, Harvard Medical School, MA, USA"]
+    "name": "Frederick, Blaise B.",
+    "orcid": "0000-0001-5832-5279"
+  },
   {
     "affiliation": "Department of Psychology, New York University, NY, USA",
     "name": "Groen, Iris I. A.",