docs/security.md references a non-existent `nh integrations` command

\`docs/security.md\` (the "Integration health checks" bullet, around line 218) says *"\`nh integrations\` / the board's integrations page authenticate against…"*. \`\`\` $ nh integrations --help Error: No such command 'integrations'. \`\`\` The board surface exists (\`/api/integrations\` and \`/api/integrations/{name}/test\` in \`src/no_human/api/app.py\`); only the CLI verb is fictional. The bullet's inline citations into \`src/no_human/integrations/__init__.py\` have also drifted — the status surface is \`list_integrations\` (around line 373). **Fix:** drop \`nh integrations\` from the sentence (keep the board page) and re-point the two line citations at \`list_integrations\`. Docs only, ~3 lines.