add Ben and Piyush to .zenodo.json (AMReX-Astro#1510)

Author: zingale

.zenodo.json

@@ -43,11 +43,21 @@
             "name": "Malone, Chris",
             "orcid": "0000-0002-4045-7932"
         },
+        {
+            "affiliation": "Leiden Observatory",
+            "name": "Sharda, Piyush",
+            "orcid": "0000-0003-3347-7094"
+        },
         {
             "affiliation": "Arizona State University",
             "name": "Timmes, Frank",
             "orcid": "0000-0002-0474-159X"
         },
+        {
+            "affiliation": "Michigan State University",
+            "name": "Wibking, Benjamin",
+            "orcid": "0000-0003-3175-2291"
+        },
         {
             "affiliation": "Center for Computational Sciences and Engineering, Lawrence Berkeley National Laboratory",
             "name": "Willcox, Donald",