Update application-gateway-limits.md

Author: JackStromberg

includes/application-gateway-limits.md

@@ -18,6 +18,7 @@ ms.author: greglin
 | Instances per gateway |V1 SKU - 32<br>V2 SKU - 125 | |
 | SSL certificates |100<sup>1</sup> |1 per HTTP listener |
 | Maximum SSL certificate size |V1 SKU - 10 KB<br>V2 SKU - 16 KB| |
+| Maximum trusted client CA certificate size | 25 KB| |
 | Authentication certificates |100 | |
 | Trusted root certificates |100 | |
 | Request timeout minimum |1 second | |