Update install.sh

[WUXM5]

Summary

Related issue

Changes

Verification

npm test
npm run validate:site-skills

Impact

• Public helper API or behavior
• Agent skill or instructions
• Site learning
• Installation or update flow
• Build, CI, or release process
• Documentation only
• No externally visible impact

Checklist

• The PR targets the correct base branch (dev for normal changes; only dev may target main).
• The change is focused and does not include unrelated cleanup.
• Tests were added or updated for behavior changes, or the reason they are unnecessary is explained above.
• Relevant tests and validation commands pass locally.
• Public helper JSDoc and agent-facing documentation are updated when the helper surface changes.
• No credentials, tokens, cookies, personal data, or other secrets are included.
• A release-note label is selected (feat, fix, docs, chore, ci, or refactor).