Docs: README incorrectly lists Cursor as a CLI-checked agent in `specify check`

[mnriem]

Summary

README.md (line ~406) states that specify check looks for "Cursor CLI" among installed agents. However, Cursor is registered as an IDE-based integration (requires_cli: False), so specify check never probes for it. This misleads users into expecting a check that does not happen.

Evidence

• README.md:406 — "The CLI will check if you have Claude Code, Gemini CLI, Cursor CLI, Qwen CLI, ... installed."
• src/specify_cli/integrations/cursor_agent/__init__.py:26 — requires_cli: False
• specify check only probes agents with requires_cli: True.

Suggested fix

Update the README so Cursor is not listed as a CLI-checked agent (remove it from the check list, or clarify that it is IDE-based and not probed).