Update exploit-kit-behavior.md

Changing title from "Exploit Kit Behavior" to "Exploit Kit" since none of the other behaviors have "Behavior" in the title.

impact/exploit-kit-behavior.md

@@ -5,7 +5,7 @@
 |**Related ATT&CK Technique**|[Exploit Public-Facing Application](https://attack.mitre.org/techniques/T1190)|
 
 
-Exploit Kit Behavior
+Exploit Kit
 ====================
 An Exploit Kit is a toolkit that exploits vulnerabilities in software to deliver malicious payloads (malware).