💡 Renamed the cookie used for the private mode

issue https://github.com/TryGhost/Ghost/issues/12564

- This change means users who have already entered the site password will need to do it again

core/frontend/apps/private-blogging/lib/middleware.js

@@ -47,6 +47,7 @@ const privateBlogging = {
         res.isPrivateBlog = true;
 
         return session({
+            name: 'ghost-private',
             maxAge: constants.ONE_MONTH_MS,
             signed: false,
             sameSite: 'none'