Update build-ui.mdx (#19)

avaialble -> available

mirror-docs/docs/build/build-ui.mdx

@@ -109,7 +109,7 @@ Next to the above buttons there are helper options you can choose to enable to h
 
 - The "Relative" checkbox will toggle between world and local Space. When unchecked, whenever you move, rotate or scale an object, you do so independent of the orientation of the object and do it based on the absolute world axes. However, when you enable relative, you will be moving, rotating or scaling the object based on its own orientation and axes.
 - The "Snap" checkbox will enable snaping while the drop down menu next to it will allow you to choose the snap iteration amount.
-- The "Show Colliders" is currently a work in progress; we're working on making it avaialble soon.
+- The "Show Colliders" is currently a work in progress; we're working on making it available soon.
 - The "Visible Tris" will display how many tris are currently drawn in your current view as well as your maximum tris budget.
 
 On the right side of the main toolbar you'll find the below buttons: