feat: add DNS Entry for justtobbi.is-a.dev

For verification purposes, I added the new required page enforced by github.

domains/_github-pages-challenge-justTOBBI.justtobbi

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "justtobbi",
+        "email": "justtobbi@gmail.com"
+    },
+    "record": {
+        "TXT": "40c1c0481529b00233ccf00048c45c"
+    }
+}