Fix security-advisory link to Okwu-AI/corpus

Author: KoyoAli

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: true
 contact_links:
   - name: Report a security or rights problem
-    url: https://github.com/NKENNEAi-Okwu/corpus/security/advisories/new
+    url: https://github.com/Okwu-AI/corpus/security/advisories/new
     about: Do not open a public issue for vulnerabilities or rights disputes. See SECURITY.md.