Update README.md for the CWE-940 showcase (#540)

Author: LiangPPP

README.md

@@ -74,7 +74,8 @@
 *   [CWE-798](https://quark-engine.readthedocs.io/en/latest/quark_script.html#detect-cwe-798-in-android-application-ovaa-apk)  Use of Hard-coded Credentials 
 *   [CWE-921](https://quark-engine.readthedocs.io/en/latest/quark_script.html#detect-cwe-921-in-android-application-ovaa-apk)  Storage of Sensitive Data in a Mechanism without Access Control 
 *   [CWE-925](https://quark-engine.readthedocs.io/en/latest/quark_script.html#detect-cwe-925-in-android-application-insecurebankv2-androgoat)  Improper Verification of Intent by Broadcast Receiver
-*   [CWE-926](https://quark-engine.readthedocs.io/en/latest/quark_script.html#detect-cwe-926-in-android-application-dvba-apk)  Improper Export of Android Application Components 
+*   [CWE-926](https://quark-engine.readthedocs.io/en/latest/quark_script.html#detect-cwe-926-in-android-application-dvba-apk)  Improper Export of Android Application Components
+*   [CWE-940](https://quark-engine.readthedocs.io/en/latest/quark_script.html#detect-cwe-940-in-android-application-ovaa-vuldroid)  Improper Verification of Source of a Communication Channel 
 
 # Quick Start