update sssst.is-cool.dev.json

domains/sssst.is-cool.dev.json

@@ -1,7 +1,7 @@
 {
-    "description": "Used for my own website hosted by a Raspberry Pi 5.",
+    "description": "This domain will host my developer portfolio, showing my open-source contributions, Raspberry Pi hosting setup, and technical blog posts.",
     "domain": "is-cool.dev",
-    "subdomain": "sssstf0rest",
+    "subdomain": "sssst",
     "owner": {
         "repo": "https://github.com/sssstf0rest",
         "email": "haoshen0226@gmail.com"