Adding missing rule 942310

Rule 942310 was missing from the list of rules.

Author: phillipsj

articles/application-gateway/application-gateway-crs-rulegroups-rules.md

@@ -192,6 +192,7 @@ The following rule groups and rules are available when using Application Gateway
 |942270|Looking for basic sql injection. Common attack string for mysql oracle and others.|
 |942290|Finds basic MongoDB SQL injection attempts|
 |942300|Detects MySQL comments, conditions and ch(a)r injections|
+|942310|Detects chained SQL injection attempts 2/2|
 |942320|Detects MySQL and PostgreSQL stored procedure/function injections|
 |942330|Detects classic SQL injection probings 1/2|
 |942340|Detects basic SQL authentication bypass attempts 3/3|