Mention that Godot uses Mikktspace in List of features

This is also mentioned in Importing scenes, but it makes sense
to mention it in List of features as this is an expected feature of
most 3D engines nowadays.

about/list_of_features.rst

@@ -484,6 +484,8 @@ Import
    - Wavefront OBJ (static scenes only, can be loaded directly as a mesh).
 
 - Support for loading glTF 2.0 scenes at run-time, including from an exported project.
+- 3D meshes use `Mikktspace <http://www.mikktspace.com/>`__ to generate tangents
+  on import, which ensures consistency with other 3D applications such as Blender.
 
 Input
 ^^^^^

tutorials/assets_pipeline/importing_scenes.rst

@@ -251,8 +251,8 @@ Ensure Tangents
 
 If textures with normal mapping are to be used, meshes need to have tangent arrays.
 This option ensures that these are generated if not present in the source scene.
-Godot uses Mikktspace for this, but it's always better to have them generated in
-the exporter.
+Godot uses `Mikktspace <http://www.mikktspace.com/>`__ for this,
+but it's always better to have them generated in the exporter.
 
 Storage
 ^^^^^^^