Add GitHub Pages challenge domain configuration

domains/_github-pages-challenge-sameer-saif1.sameersaif.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "Sameer-Saif1",
+    "email": "iamsameersaif@gmail.com"
+  },
+  "records": {
+    "TXT": "e5caecb9d748aa2879e5b9036d9de5"
+  }
+}