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>

data/admin-content.json

@@ -1083,7 +1083,7 @@
     "welcomeEmailScriptureRef": "Titus 2:11 - BSB",
     "welcomeEmailSignoff": "Grace and peace,\nNate",
     "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": [
       {
         "id": "mpvh1okr",