Update karthik-portfolio.is-a.dev: A record + Vercel domain verification

domains/_vercel.karthik-portfolio.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "karthikeya2536",
+        "email": "yemulakarthikeya@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=karthik-portfolio.is-a.dev,ef6849278d7d5889bad4"
+    }
+}

domains/karthik-portfolio.json

@@ -4,6 +4,6 @@
         "email": "yemulakarthikeya@gmail.com"
     },
     "records": {
-        "CNAME": "cname.vercel-dns.com"
+        "A": ["216.198.79.1"]
     }
-}
+}