Update docs/backend-system/building-plugins-and-modules/08-migrating.md

Signed-off-by: Johan Haals <johan.haals@gmail.com>

Co-authored-by: Fredrik Adelöw <freben@gmail.com>
Signed-off-by: Johan Haals <johan@haals.se>

docs/backend-system/building-plugins-and-modules/08-migrating.md

@@ -63,7 +63,7 @@ export const kubernetesPlugin = createBackendPlugin({
           discovery,
         }).build();
 
-        // We registered the router with the http service.
+        // We register the router with the http service.
         http.use(router);
       },
     });