Fix MX records: use 'target' key and remove trailing dots

data/records/atharvaupadhyay.json

@@ -0,0 +1,22 @@
+{
+    "owner": {
+        "username": "atharvaupadhyay",
+        "email": "atharvaupadhyay001@gmail.com",
+        "discord": "atharvaupadhyay"
+    },
+    "records": {
+        "A": [
+            "216.198.79.1"
+        ],
+        "MX": [
+            {
+                "priority": 10,
+                "target": "mx1.improvmx.com"
+            },
+            {
+                "priority": 20,
+                "target": "mx2.improvmx.com"
+            }
+        ]
+    }
+}