feat(email-templates): update release note template for Worklenz 2.1.0

- Added a title and meta subject for the release note template.
- Enhanced styling for better readability and user experience, including background color, font adjustments, and button styles.
- Introduced new sections for features, including a new tasks list, kanban board, group view, language support, and bug fixes.
- Improved responsiveness and dark mode support for the email template.

worklenz-frontend/index.html

@@ -45,7 +45,7 @@
           // Determine which tracking ID to use based on the environment
           const isProduction = window.location.hostname === 'app.worklenz.com';
 
-          const trackingId = isProduction ? 'G-XXXXXXXXXX' : 'G-3LM2HGWEXG'; // Open source tracking ID
+          const trackingId = isProduction ? 'G-7KSRKQ1397' : 'G-3LM2HGWEXG'; // Open source tracking ID
 
           // Load the Google Analytics script
           const script = document.createElement('script');