docs: add note about closed upstream issue in test skip

Updates test skip comment in api.jupyterProvider.vscode.test.ts to note
that the upstream issue #14338 was closed in December 2023. The skip may
no longer be necessary but requires testing in a conda environment to
confirm before removal.

The issue was related to a temporary Jupyter Notebook/Traitlets
compatibility problem that has since been resolved upstream.

Reference: microsoft/vscode-jupyter#14338

Addresses CodeRabbit review feedback.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: Artmann

src/test/standalone/api/unstable/api.jupyterProvider.vscode.test.ts

@@ -45,6 +45,7 @@ suite('Jupyter Provider Tests', function () {
         }
         if (IS_CONDA_TEST()) {
             // Due to upstream issue documented here https://github.com/microsoft/vscode-jupyter/issues/14338
+            // Note: This issue was closed in Dec 2023. This skip may no longer be necessary and should be tested.
             return this.skip();
         }
         this.timeout(120_000);