doc: add link to V8

Added the link redirecting to the V8 engine github repository just like
libuv.

PR-URL: #38144
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

doc/api/addons.md

@@ -16,7 +16,7 @@ Node-API.
 When not using Node-API, implementing addons is complicated,
 involving knowledge of several components and APIs:
 
-* V8: the C++ library Node.js uses to provide the
+* [V8][]: the C++ library Node.js uses to provide the
   JavaScript implementation. V8 provides the mechanisms for creating objects,
   calling functions, etc. V8's API is documented mostly in the
   `v8.h` header file (`deps/v8/include/v8.h` in the Node.js source
@@ -1362,6 +1362,7 @@ console.log(result);
 [Embedder's Guide]: https://github.com/v8/v8/wiki/Embedder's%20Guide
 [Linking to libraries included with Node.js]: #addons_linking_to_libraries_included_with_node_js
 [Native Abstractions for Node.js]: https://github.com/nodejs/nan
+[V8]: https://v8.dev/
 [`Worker`]: worker_threads.md#worker_threads_class_worker
 [bindings]: https://github.com/TooTallNate/node-bindings
 [download]: https://github.com/nodejs/node-addon-examples