Fix casing in copies

lib/services/sync_service.dart

@@ -243,8 +243,8 @@ class SyncService {
     if ((now - lastNotificationShownTime) > microSecondsInDay) {
       await _prefs.setInt(kLastStorageLimitExceededNotificationPushTime, now);
       NotificationService.instance.showNotification(
-        "storage limit exceeded",
-        "sorry, we had to pause your backups",
+        "Storage limit exceeded",
+        "Sorry, we had to pause your backups",
       );
     }
   }

lib/services/update_service.dart

@@ -71,8 +71,8 @@ class UpdateService {
         hasBeen3DaysSinceLastNotification &&
         _latestVersion.shouldNotify) {
       NotificationService.instance.showNotification(
-        "update available",
-        "click to install our best version yet",
+        "Update available",
+        "Click to install our best version yet",
       );
       await _prefs.setInt(kUpdateAvailableShownTimeKey, now);
     } else {