Create rishab-tech.json for portfolio and blog

Added a JSON file for Rishab Khatokar's portfolio and tech blog with relevant details.

domains/rishab-tech.json

@@ -0,0 +1,11 @@
+{
+  "description": "Rishab Khatokar portfolio and tech blog",
+  "repo": "https://github.com/rish742/Rishab-Tech-Web-portfolio",
+  "owner": {
+    "username": "rish742",
+    "email": "rishab.khatokar@gmail.com"
+  },
+  "record": {
+    "CNAME": "rishab-tech-324a3.web.app"
+  }
+}