Update acd.md

Signed-off-by: Sanjay BS <sanjay.bangalore.shivanna@sap.com>

Author: sanjay-b-s

acd.md

@@ -54,7 +54,7 @@ standardize logging practices.
 
 ### 4.3 Architecture Diagram
 
-![Architecture Overview] (ArchitectureOverview.png)
+! [Architecture Overview] (ArchitectureOverview.png)
 
 
 ## 5. ARCHITECTURE DECISIONS