fix(config): make stacktrace path correct when sourcemap is enabled

Author: sapphi-red

packages/vite/src/node/config.ts

@@ -1720,6 +1720,8 @@ async function bundleConfigFile(
     format: isESM ? 'esm' : 'cjs',
     mainFields: ['main'],
     sourcemap: 'inline',
+    // the last slash is needed to make the path correct
+    sourceRoot: pathToFileURL(path.dirname(fileName)).href + '/',
     metafile: true,
     define: {
       __dirname: dirnameVarName,