Update dashboard.js

Author: GitTimeraider

static/dashboard.js

@@ -315,7 +315,7 @@ function showMessage(message, type = 'info') {
 
 // Generate random alias
 function generateRandomAlias(length = 20) {
-    const chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+    const chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
     let result = '';
     for (let i = 0; i < length; i++) {
         result += chars.charAt(Math.floor(Math.random() * chars.length));