Update arch.json

Add an email I am more likely to reply to.

domains/arch.json

@@ -3,7 +3,7 @@
   "repo": "https://github.com/Arch881010/Arch881010",
   "owner": {
     "username": "Arch881010",
-    "email": "c1yd4.arch@inbox.testmail.app",
+    "email": "arch@arch1010.dev",
     "discord": "arch1010",
     "discord-id": "410248634593050627"
   },