Update license ID in zenodo.json

This change updates the license name in the zenodo.json file to match the valid value provided by Zenodo for BSD-3.

.zenodo.json

@@ -36,6 +36,6 @@
     "GIS",
     "earth analytics"
   ],
-  "license": "BSD-3",
+  "license": "BSD-3-Clause",
   "upload_type": "software"
 }