fix rendering of day number in month view

Signed-off-by: Fabrizio Iannetti <fabrizio.iannetti@gmail.com>

src/ui/calendar.rs

@@ -427,7 +427,7 @@ impl<'a> CalendarMonthView<'a> {
                         vertical_alignment: alignment::Vertical::Top,
                         shaping: Shaping::default(),
                     },
-                    bounds.position(),
+                    day_bounds.position(),
                     fg,
                 );