Docs: canonicalize gh codespace ports visibility in Python setup

Replace `gh cs` with `gh codespace` for portability and docs parity; update 5000 example. No behavior change. Validated in Codespaces with $CODESPACE_NAME.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 02ez

content/codespaces/setting-up-your-project-for-codespaces/adding-a-dev-container-configuration/setting-up-your-python-project-for-codespaces.md

@@ -169,7 +169,7 @@ With your dev container configuration added and a basic understanding of what ev
      "postCreateCommand": "pip3 install --user -r requirements.txt",
 
      // Automatically set port visibility when attaching to the codespace
-     "postAttachCommand": "gh cs ports visibility 5000:private -c \"$CODESPACE_NAME\"",
+     "postAttachCommand": "gh codespace ports visibility 5000:private -c \"$CODESPACE_NAME\"",
 
      // Configure tool-specific properties.
      "customizations": {