[dajiaohuang]

Summary

The Configuration page's Sandbox Variants table still lists jupyter as the default variant and engine. The configuration constant (JUPYTER_SERVER_VARIANT), CLI default, surrounding prose, and Jupyter Server sandbox guide all use jupyter-server; jupyter is the pre-rename spelling discussed in #389.

Correct the two labels in that row. No behavior or other variants change.

Validation

• npm run build in docs/ passed.
• Regenerated the MCP reference using the four Docs-workflow commands; no checked-in reference drift.
• 40 focused existing config/schema/core-extension tests passed.
• Local notebook creation/editing/execution smoke passed through standalone HTTP, STDIO, and the Jupyter extension, with isolated loopback servers and small self-authored fixtures.
• git diff --check passed.

Local environment: Windows, Python 3.14.7, Node 24.14.1. Full suite and cloud/UI deployments were not run; this changes documentation only.

[echarles]

LGTM Thx @dajiaohuang