CWA-2023-004 updated with CertiK article reference

CWAs/CWA-2023-004.md

@@ -53,6 +53,10 @@ This can lead to
 modules of several hundreds of megabytes or even gigabytes, leading to unexpected cache behaviour, unexpected disk
 consumption, slowdows and in some cases even crashes of the node process.
 
+More in-depth description including the technical details can be found in the
+[article](https://www.certik.com/resources/blog/risk-and-security-enhancement-for-app-chains-an-in-depth-writeup-of-cwa-2023)
+released later by CertiK team.
+
 ## Patch
 
 - 1.5: https://github.com/CosmWasm/cosmwasm/compare/v1.5.0...v1.5.1