Update overview.md

Author: dlepow

articles/api-management/breaking-changes/overview.md

@@ -30,7 +30,7 @@ The following table lists all the upcoming breaking changes and feature retireme
 | [Git repository retirement][git2025] | March 15, 2025 |
 | [Direct management API retirement][mgmtapi2025] | March 15, 2025 |
 | [Workspaces preview breaking changes, part 2][workspaces2025march] | March 31, 2025 |
-| [Managed certificates suspension][managed-certificates-suspension-august-2025] | August 15, 2025 |
+| [Managed certificates suspension][managed-certificates-suspension-august-2025] | August 15, 2025 - March 15, 2026|
 | [ADAL-based Microsoft Entra ID identity provider retirement][msal2025] | September 30, 2025 |
 | [CAPTCHA endpoint update][captcha2025] | September 30, 2025 |
 | [Built-in analytics dashboard retirement][analytics2027] | March 15, 2027 |