Interactive Playground is missing on distribution files

[sr229]

• code-server version: master LKGR (1.38.1 Upstream)
• OS Version: Windows 10 Insider Pro for Workstations (Ubuntu WSL2)

Description

Clicking on interactive Playground renders a missing Markdown file that seems to handle the interactive playground itself. It seems we're not including it on the distribution yet its included in the menu entries.

Steps to Reproduce

1. Go to Help > Interactive Playground
2. Code-Server will report the missing file in the distribution.