Bump @vscode/test-electron from 2.3.8 to 2.3.9

Bumps [@vscode/test-electron](https://github.com/Microsoft/vscode-test) from 2.3.8 to 2.3.9.
- [Changelog](https://github.com/microsoft/vscode-test/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Microsoft/vscode-test/commits/v2.3.9)

---
updated-dependencies:
- dependency-name: "@vscode/test-electron"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -97,7 +97,7 @@
     "@typescript-eslint/parser": "6.18.0",
     "@ungap/structured-clone": "1.2.0",
     "@vscode/debugprotocol": "1.64.0",
-    "@vscode/test-electron": "2.3.8",
+    "@vscode/test-electron": "2.3.9",
     "@vscode/vsce": "2.22.0",
     "esbuild": "0.19.11",
     "eslint": "8.56.0",