Update siddharth.json

Portfolio website 
https://siddharthjain.vercel.app/

Author: siddharth9300

domains/siddharth.json

@@ -9,7 +9,7 @@
     "target": {
         "CNAME": {
             "name": "siddharth",
-            "value": "next-js-portfolio-ljunr9x05-siddharth9300s-projects.vercel.app"
+            "value": "siddharthjain.vercel.app"
         },
         "TXT": {
             "name": "_vercel",