Fix links and formatting in CHANGELOG_121125.md

Author: jolettacheungoracle

release/CHANGELOG_121125.md

@@ -20,7 +20,7 @@ December 11, 2025
 - Helm chart updated to enable custom Grafana, cert-manager, Ingress ([corrino-lens-devops #54](https://github.com/oci-ai-incubations/corrino-lens-devops/pull/54), [@gablyu-oci](https://github.com/gablyu-oci))
 
 #### Portal
-- Address security vulnerabilities ([corrino-lens-portal commit#629c424](https://github.com/oci-ai-incubations/corrino-lens-cp/pull/50](https://github.com/oci-ai-incubations/corrino-lens-portal/commit/629c424eea92a4dbd1d5e66eb2eec9dde54c87ca)), [@jolettacheungoracle](https://github.com/jolettacheungoracle))
+- Address security vulnerabilities ([corrino-lens-portal commit#629c424](https://github.com/oci-ai-incubations/corrino-lens-portal/commit/629c424eea92a4dbd1d5e66eb2eec9dde54c87ca), [@jolettacheungoracle](https://github.com/jolettacheungoracle))
 
 #### Backend
 - Active health check trigger via CP ([corrino-lens-cp #50](https://github.com/oci-ai-incubations/corrino-lens-cp/pull/50), [@rtkgupta](https://github.com/rtkgupta))