update # signatures to 67000

Author: vhorne

articles/firewall/overview.md

@@ -30,7 +30,7 @@ To learn about Firewall Standard features, see [Azure Firewall Standard features
 
 ## Azure Firewall Premium
 
-   Azure Firewall Premium provides advanced capabilities include signature-based IDPS to allow rapid detection of attacks by looking for specific patterns. These patterns can include byte sequences in network traffic, or known malicious instruction sequences used by malware. There are more than 58,000 signatures in over 50 categories that are updated in real time to protect against new and emerging exploits. The exploit categories include malware, phishing, coin mining, and Trojan attacks.
+   Azure Firewall Premium provides advanced capabilities include signature-based IDPS to allow rapid detection of attacks by looking for specific patterns. These patterns can include byte sequences in network traffic, or known malicious instruction sequences used by malware. There are more than 67,000 signatures in over 50 categories that are updated in real time to protect against new and emerging exploits. The exploit categories include malware, phishing, coin mining, and Trojan attacks.
 
    ![Firewall Premium overview](media/overview/firewall-premium.png)