Summary: ChatDOC updates sign-up link and pricing layout

Why It Matters: The changes appear to be minor technical fixes and formatting updates to the landing page and pricing table. These adjustments ensure the sign-up process works correctly and the pricing information is easier to read.

What Changed:

• Updated the "Sign Up for Free" button link from a "www" subdomain to a root domain.
• Cleaned up the pricing table layout by removing extra line breaks between numbers and units (e.g., "60 MB" instead of "60 \n MB").
• Removed a small redundant text fragment from the bottom of the page.