Merge pull request #28663 from ShirakawaMio/main

add mio.json

domains/mio.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "ShirakawaMio",
+    "email": "mio.liu.rx@gmail.com"
+  },
+  "records": {
+    "CNAME": "shirakawamio.github.io"
+  }
+}