Update quicklook.rst

docs/aoa/quicklook.rst

@@ -15,7 +15,7 @@ If the per CPU mode is on (by clicking the ``1`` key):
 .. image:: ../_static/quicklook-percpu.png
 
 In the Curses/terminal interface, it is also possible to switch from bar to
-sparkline using 'S' hot key or --sparkline command line option (nned the
+sparkline using 'S' hot key or --sparkline command line option (need the
 sparklines Python lib on your system). Please be aware that sparklines use
 the Glances history and will not be available if the history is disabled from
 the command line.