Various grammar and spelling fixes

tutorials/performance/gpu_optimization.rst

@@ -65,7 +65,7 @@ other). This can be done by artists, or programmatically within Godot using an a
 There is also a cost to batching together objects in 3D. Several objects
 rendered as one cannot be individually culled. An entire city that is off-screen
 will still be rendered if it is joined to a single blade of grass that is on
-screen. Thus, you should always take objects' location and culling into account
+screen. Thus, you should always take objects' locations and culling into account
 when attempting to batch 3D objects together. Despite this, the benefits of
 joining static objects often outweigh other considerations, especially for large
 numbers of distant or low-poly objects.

tutorials/performance/pipeline_compilations.rst

@@ -134,7 +134,7 @@ the project or the environment. The pipeline precompilation system will keep
 track of these features as they're encountered for the first time and enable
 precompilation of them for any meshes or surfaces that are created afterwards.
 
-If your game makes use of these features, **make sure to have an scene that uses
+If your game makes use of these features, **make sure to have a scene that uses
 them as early as possible** before loading the majority of the assets. This
 scene can be very simple and will do the job as long as it uses the features the
 game plans to use. It can even be rendered off-screen for at least one frame if