Summary: Rebrandly adds permanent link reliability guarantee

Why It Matters: The update clarifies that links do not expire and can be edited later. This addresses a common fear for users who print links on physical materials or run long-term marketing campaigns.

What Changed:

• Added a specific clarification that links work permanently unless manually deleted.
• Highlighted the ability to update destination URLs without changing the short link itself.
• Duplicated a navigation link in the header section.