[PostgreSQL] update cert include file for root CA

Author: Tameika-MSFT

articles/postgresql/security/includes/certificate-rotation.md

@@ -11,7 +11,7 @@ ms.topic: include
 ---
 
 > [!IMPORTANT]  
-> **Microsoft started a TLS certificate rotation for Azure Database for PostgreSQL** to update intermediate CA certificates and the resulting certificate chain. The root CAs stay the same.
+> **Microsoft started a TLS certificate rotation for Azure Database for PostgreSQL** to update intermediate CA certificates and the resulting certificate chain. The root CA certificates stay the same.
 >
 > If your client configuration uses the [***Recommended configurations for TLS***](../security-tls.md#recommended-configurations-for-tls), you don't need to take any action.
 > 
@@ -21,4 +21,7 @@ ms.topic: include
 > - Updates for UK South and US Government regions start on January 21, 2026.
 > - Updates for Central US start on January 26, 2026.
 > - Updates for all other regions start on January 28, 2026.
-> - After the Spring Festival (Chinese New Year) 2026, China regions will also undergo a certificate rotation that includes a **change to one of the root CAs**.
+
+**Root certificate rotation schedule:**
+
+> - Updates for root certificates in China regions start March 9, 2026.