fix: add cc-by to license options

envidat_licenses.json

@@ -25,6 +25,19 @@
     "title": "ODbL with Database Contents License (DbCL)",
     "url": "https://opendefinition.org/licenses/odc-odbl"
   },
+  {
+    "domain_content": true,
+    "domain_data": true,
+    "domain_software": false,
+    "family": "",
+    "id": "cc-by",
+    "maintainer": "Creative Commons",
+    "od_conformance": "approved",
+    "osd_conformance": "not reviewed",
+    "status": "active",
+    "title": "Creative Commons Attribution",
+    "url": "https://creativecommons.org/licenses/by/4.0/"
+  },
   {
     "domain_content": true,
     "domain_data": true,