Update vite.config.unit.ts

Co-authored-by: Matěj Chalk <34691111+matejchalk@users.noreply.github.com>

Author: BioPhoton

testing/test-setup/vite.config.unit.ts

@@ -1,6 +1,6 @@
 /// <reference types="vitest" />
 import { defineConfig } from 'vite';
-import { tsconfigPathAliases } from '../../tools/vitest-tsconfig-path-aliases';
+import { tsconfigPathAliases } from '../../tools/vitest-tsconfig-path-aliases.js';
 
 export default defineConfig({
   cacheDir: '../node_modules/.vite/test-setup',