Merge pull request #33992 from Lum1104/main

Register lum as a subdomain

domains/lum.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "Lum1104",
+        "email": "lin.yuxiang.contact@gmail.com"
+    },
+    "records": {
+        "CNAME": "lum1104.github.io"
+    }
+}