Update articles/azure-resource-manager/bicep/diagnostics/bcp147.md

Co-authored-by: Anthony Martin <[email protected]>

Author: mumian

articles/azure-resource-manager/bicep/diagnostics/bcp147.md

@@ -8,7 +8,7 @@ ms.date: 08/23/2024
 
 # Bicep error code - BCP147
 
-This error occurs when you have a `@allowed()` decorator but miss the `param` declaration.
+This error occurs when you have a decorator that is expecting to be followed by a `param` declaration, but miss the `param` declaration.
 
 ## Error description