Update bug_report.yml

Author: naveensingh

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -24,7 +24,7 @@ body:
           required: true
         - label: "This issue contains only one bug."
           required: true
-        - label: "I have read and understood the [contribution guidelines](https://github.com/FossifyOrg/fossifyorg.github.io/blob/master/CONTRIBUTING.md)."
+        - label: "I have read and understood the [contribution guidelines](https://github.com/FossifyOrg/fossifyorg.github.io/blob/main/CONTRIBUTING.md)."
           required: true
 
   - type: input