add _vercel.yanis.is-a.dev TXT for ownership verification

domains/_vercel.yanis.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "YanisCodes",
+    "email": "yanisoukaci667@gmail.com"
+  },
+  "records": {
+    "TXT": ["vc-domain-verify=yanis.is-a.dev,d4fd6f76388919ec6508"]
+  }
+}