[evolution] User Docs: Add a TODO

[Andre Klapper <aklapper src gnome org>]

commit 0d748560e07eb19a6f064d63df9a38d9a035029f
Author: Andre Klapper <a9016009 gmx de>
Date:   Sat Aug 18 23:21:46 2012 +0200

    User Docs: Add a TODO

 help/C/exporting-data-calendar.page |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/help/C/exporting-data-calendar.page b/help/C/exporting-data-calendar.page
index 3d4f628..02c3745 100644
--- a/help/C/exporting-data-calendar.page
+++ b/help/C/exporting-data-calendar.page
@@ -21,5 +21,6 @@
 
 <p>To export a complete calendar, right-click on the calendar in the list of calendars and click <gui>Save as</gui>. Available formats are iCalendar format (ICS, recommended), comma separated values (CSV), and RDF format.</p>
 <p>If you want to export only one appointment, right-click on the appointment and click <gui>Save as iCalendar...</gui>.</p>
+<!-- TODO: This might need an update for >=3.5.90 thanks to http://git.gnome.org/browse/evolution/commit/?id=e1f45e288a00334bc52844f6656cf0f7bb54ddd7 -->
 
 </page>