Update ovito.md

docs.it4i/software/viz/ovito.md

@@ -22,8 +22,8 @@ $ ml av ovito
 
 ## Getting Started
 
-Visualization software requires graphical user interface and virtual network computing software.
-For more information, see the [X Window System][1] and [VNC][2] sections.
+Visualization software requires graphical user interface or virtual network computing software.
+For more information, see the [X Window System][1] or [VNC][2] section.
 
 ## Running Serial Applications