core(deps): update ctfd-setup schema (SchemaStore#4658)

Co-authored-by: pandatix <[email protected]>

Author: pandatix

src/schemas/json/ctfd.json

@@ -9,6 +9,10 @@
           "type": "string",
           "description": "The domain whitelist (a list separated by colons) to allow users to have email addresses from."
         },
+        "domain_blacklist": {
+          "type": "string",
+          "description": "The domain blacklist (a list separated by colons) to blocks users to have email addresses from."
+        },
         "verify_emails": {
           "type": "boolean",
           "description": "Whether to verify emails once a user register or not."