Adding challenge 1 issue link in markdown file

Author: prerakd

contributors/prerakd/prerakd.md

@@ -1,4 +1,5 @@
 ---
 name: Prerak Dholakiya
 github_user_name: prerakd
+url_of_github_issue: https://github.com/scaleracademy/scaler-open-source-september-challenge/issues/1148
 ---