chore(deps-dev): bump @vscode/test-electron from 2.3.8 to 2.3.9 in /extensions/vscode (#1270)

Author: dependabot[bot]

extensions/vscode/package-lock.json

@@ -162,7 +162,7 @@
     "@types/vscode": "^1.79.0",
     "@typescript-eslint/eslint-plugin": "^6.20.0",
     "@typescript-eslint/parser": "^6.20.0",
-    "@vscode/test-electron": "^2.3.8",
+    "@vscode/test-electron": "^2.3.9",
     "c8": "^9.1.0",
     "eslint": "^8.56.0",
     "glob": "^10.3.10",