Change optionalPropertyRendering from 'always' to 'never' (#51)

Author: mattapperson

.speakeasy/gen.yaml

@@ -6,7 +6,7 @@ generation:
   sdkClassName: OpenRouter
   maintainOpenAPIOrder: true
   usageSnippets:
-    optionalPropertyRendering: always
+    optionalPropertyRendering: never
     sdkInitStyle: constructor
   useClassNamesForArrayFields: true
   fixes: