Fix building for Cloudflare Nitro preset (#1726)

It seems that Rollup node-resolve module doesn't properly deal with
trailing slashes, causing it to thing that `string_decoder` is a
built-in Node.js dependency and attempt to import it from `unenv`, which
will obviously fail, because `string_decoder` is not, in fact, a Node.js
dependency, but an individual dependency of `readable-stream`.

This adds a small patch for `readable-stream@2.3.8` dependency, which
removes the leading slash, which seems to fix the builds.

This probably should be reported to relevant developers (Rollup
node-resolve plugin or Nitro?).

package.json

@@ -57,7 +57,8 @@
   "packageManager": "pnpm@9.3.0",
   "pnpm": {
     "patchedDependencies": {
-      "markdown-it@13.0.1": "patches/markdown-it@13.0.1.patch"
+      "markdown-it@13.0.1": "patches/markdown-it@13.0.1.patch",
+      "readable-stream@2.3.8": "patches/readable-stream@2.3.8.patch"
     }
   }
 }