Fix Java example template to properly wrap long scenario names in comments

When scenario names exceed 120 characters, the wordwrap filter was creating
a new line without the comment prefix '//'. This caused Java compilation
errors like 'class, interface, enum, or record expected'.

The fix adds the wrapstring parameter to preserve the comment prefix on
wrapped lines.

Author: St0rmingBr4in

.generator/src/generator/templates/example.j2

@@ -1,4 +1,4 @@
-// {{ scenario.name|wordwrap(width=120)}}
+// {{ scenario.name|wordwrap(width=120, wrapstring='\n// ')}}
 
 {%- set required_parameters, optional_parameters, parameters_models = format_parameters(context.api_request.kwargs, spec=operation_spec, replace_values=context._replace_values, has_body=context.body) %}
 {%- if context.body %}