Release Notes:

- Fixed broken links in the installer Terms of Service dialog (#62677).

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### Description

Closes #62677

In `script/terms/terms.rtf` and `legal/terms.md` (as well as
`legal/privacy-policy.md` and `legal/third-party-terms.md`), relative
URLs like `/privacy-policy` and `/acceptable-use-policies` caused error
-50 ("The application can't be opened") when clicked from installer
dialogs (such as the macOS installer).

This PR updates the relative URLs to absolute `https://zed.dev` URLs so
they open properly in the browser.