chore(login): update the login banners (#58406)

Updated the login banners to include a Discord integration and render
blocking resources post

Author: pevensentry

src/sentry/templates/sentry/partial/alerts.html

@@ -78,9 +78,9 @@
   <div class="alert-banner">
     <div class="alert-message">
       {% if banner_choice == 0 %}
-      Find your most time-consuming database queries and impacted API endpoints with Query Insights. &nbsp<a target="_blank" href="https://blog.sentry.io/find-slow-database-queries-with-query-insights/?utm_medium=banner&utm_source=sentry-app&utm_campaign=login-query-insights-blog&utm_content=login-banner&utm_term=">Learn more</a>.
+      Get notified about Sentry issues in Discord with our new Sentry + Discord integration. &nbsp<a target="_blank" href="https://changelog.getsentry.com/announcements/discord-sentry-integration?utm_medium=banner&utm_source=sentry-app&utm_campaign=login-discord-integration&utm_content=login-banner&utm_term=">Learn more</a>.
       {% elif banner_choice == 1 %}
-      Learn how lazy loading can improve your webpage's Core Web Vitals. &nbsp<a target="_blank" href="https://blog.sentry.io/from-lcp-to-cls-improve-your-core-web-vitals-with-image-loading-best/?utm_medium=banner&utm_source=sentry-app&utm_campaign=login-lcp-to-fcp&utm_content=login-banner&utm_term=">Read more</a>.
+      Learn how to find and fix render blocking resources causing a slowdown. &nbsp<a target="_blank" href="https://blog.sentry.io/how-to-id-fix-render-blocking-resources/?utm_medium=banner&utm_source=sentry-app&utm_campaign=login-render-blocking-blog&utm_content=login-banner&utm_term=">Read more</a>.
       {% endif %}
     </div>
   </div>