docs: update new features page

Author: BobbieGoede

docs/content/docs/02.guide/91.new-features.md

@@ -24,6 +24,13 @@ definePageMeta({
 </script>
 ```
 
+### Nitro-side language detection and redirection
+Language detection and redirection has been reimplemented to be handled from the Nitro server, this allows us to redirect requests earlier in the request lifecycle which improves performance. 
+
+The previous implementation did not work correctly when combined with prerendering which this new implementation does.
+
+While this change makes detection and redirection more accurate and should better match the documented behavior, if this causes issues in your project it can be disabled by setting `experimental.nitroContextDetection: false`{lang="yml"} in the module options. The option to disable this feature is temporary and will be removed in a future version.
+
 ### Experimental strict SEO mode
 We have added a new experimental option `strictSeo`{lang="yml"} that enables strict SEO mode, which changes the way i18n head tags are handled.