forward sri value through partial manifest

Author: jacob-ebey

packages/react-router/lib/dom/ssr/fog-of-war.ts

@@ -64,7 +64,7 @@ export function getPartialManifest(
   return {
     ...manifest,
     routes: initialRoutes,
-    sri: true,
+    sri: sri ? true : undefined,
   };
 }