Update as-api-listener.md

docs/software-developer-documentation/server-side-extensions/as-api-listener.md

@@ -58,11 +58,25 @@ is provided with the V3 API jar and provides 3 methods:
     session token used for the operation, the operation result and any
     exception that happened during the operation.
 
+```{warning}
+Implicit Requirements
 
-| :red_circle: Implicit Requirements |
-|:---------------------------|
-| **Requirement 1:  The Listener should be Thread Safe Code**<br /><br />A single instance of the Listener is created during the server startup.<br /><br />Since a single instance is used to serve all requests thread safe code is a requirement.<br /><br />We strongly suggest to not to keep any state.<br /><br />**Requirement 2: The Listener should not throw Exceptions**<br /><br />If the listener throw an exception it will make the API call fail.<br /><br />**Requirement 3: The Listener should use IOperation and IOperationResult as indicated below**<br /><br />All API Operations go through every listener so the method signatures should use IOperation and IOperationResult.<br /><br />Please use instanceof for safe casting. |
+**Requirement 1:  The Listener should be Thread Safe Code**
 
+A single instance of the Listener is created during the server startup.
+
+Since a single instance is used to serve all requests thread safe code is a requirement.
+
+We strongly suggest to not to keep any state.
+
+**Requirement 2: The Listener should not throw Exceptions**
+
+If the listener throw an exception it will make the API call fail.
+
+**Requirement 3: The Listener should use IOperation and IOperationResult as indicated below**
+
+All API Operations go through every listener so the method signatures should use IOperation and IOperationResult.<br /><br />Please use instanceof for safe casting.
+```
 
 **IOperationListener**