Mocking: Fix sb.mock usage in Storybook's deployed in subpaths

code/core/src/core-server/presets/vitePlugins/vite-inject-mocker/plugin.ts

@@ -8,7 +8,7 @@ import type { ResolvedConfig, ViteDevServer } from 'vite';
 
 import { resolvePackageDir } from '../../../../shared/utils/module';
 
-const entryPath = '/vite-inject-mocker-entry.js';
+const entryPath = './vite-inject-mocker-entry.js';
 
 const entryCode = dedent`
     <script type="module" src="${entryPath}"></script>