Add .js extension to import that is missing it (#1913)

* Add `.js` extension to import

* add changelog

---------

Co-authored-by: Ryan Carniato <[email protected]>

Author: frank-weindel

.changeset/wet-forks-melt.md

@@ -0,0 +1,5 @@
+---
+"solid-js": patch
+---
+
+Add `.js` extension to import

packages/solid/src/render/hydration.ts

@@ -1,4 +1,4 @@
-import { Computation } from "../reactive/signal";
+import { Computation } from "../reactive/signal.js";
 
 export type HydrationContext = { id: string; count: number };