docs: fix

docs/options-reference.md

@@ -28,6 +28,7 @@ Here are all the options available when configuring the module and their default
   // Routes generation strategy, can be set to one of the following:
   // - 'prefix_except_default': add locale prefix for every locale except default
   // - 'prefix': add locale prefix for every locale
+  // - 'prefix_and_default': add locale prefix for every locale and default
   strategy: 'prefix_except_default',
 
   // Wether or not the translations should be lazy-loaded, if this is enabled,