Update analytics cookie banner text

Clearer language explaining what's tracked and that no personal data
is sold or shared.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/content.ts

@@ -442,7 +442,7 @@ export const DEFAULTS: SiteContent = {
   twoFaOtpEmailBody: 'Your two-factor sign-in code is below. Enter it to complete sign-in.',
   twoFaOtpEmailExpiry: 'This code expires in 10 minutes. If you did not request this, you can ignore this message.',
   headerFollowLabel: 'Follow on Spotify',
-  cookieBannerText: 'We use optional analytics cookies to measure visits and location trends for site improvement.',
+  cookieBannerText: 'We use optional analytics cookies to better understand how people find and engage with this content. By accepting, you allow us to measure how you interact with the site — no personal data is sold or shared.',
   customLinks: [],
   customBlocks: [],
   archivedSeries: [],