Guide/How Companies Fix Vulnerabilities

Created by: zlonko

This closes #5473 (closed). It adds the gated page for the "How Companies Fix Vulnerabilities" e-book.

Changelog

• Adds guides/how-google-fixes-vulnerabilities.tsx
• Adds sg-how-companies-fix-vulnerabilities.pdf for download

Notes

• This guide page will be updated with the new Hubspot form syntax in #5483

Test

1. Ensure prettier has standardized the proposed changes.
2. Navigate to /guides/how-google-fixes-vulnerabilities.tsx
3. Please check that the copy aligns with the doc
4. Please check that the guide downloads properly on form submission