Update DNS records in shakil.json

Replaced the ImprovMX with ZohoMail instead.

domains/shakil.json

@@ -5,8 +5,6 @@
     },
     "records": {
         "CNAME": "wait2late.github.io",
-        "MX": ["mx1.improvmx.com", "mx2.improvmx.com"],
-        "TXT": ["v=spf1 include:spf.improvmx.com ~all"]
-    },
-    "proxied": true
+        "TXT": ["zoho-verification=zb14913997.zmverify.zoho.eu"]
+    }
 }