Update Pause Mode documentation (#6624)

changed reference to "process" pause mode to "when paused"

tutorials/scripting/pausing_games.rst

@@ -93,8 +93,8 @@ Pause Menu Example
 ------------------
 
 Here is an example of a pause menu. Create a popup or panel with controls
-inside, and set its pause mode to "Process" then hide it. By setting the
-root of the pause popup to "Process", all children and grandchildren will
+inside, and set its pause mode to "When Paused" then hide it. By setting the
+root of the pause popup to "When Paused", all children and grandchildren will
 inherit that state. This way, this branch of the scene tree will continue
 working when paused.