fix(remix-dev): update type for ServerBuild virtual module (#3743)

Author: mcansh

.changeset/weak-icons-matter.md

@@ -0,0 +1,6 @@
+---
+"remix": patch
+"@remix-run/dev": patch
+---
+
+update type for `@remix-run/dev/server-build` virtual module #3743

packages/remix-dev/server-build.ts

@@ -10,3 +10,6 @@ throw new Error(
 export const assets: ServerBuild["assets"] = undefined!;
 export const entry: ServerBuild["entry"] = undefined!;
 export const routes: ServerBuild["routes"] = undefined!;
+export const publicPath: ServerBuild["publicPath"] = undefined!;
+// prettier-ignore
+export const assetsBuildDirectory: ServerBuild["assetsBuildDirectory"] = undefined!;