mesh.rs: the module doc says materials and corner data, not a colour per triangle

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

 src/mesh.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/mesh.rs b/src/mesh.rs
index 316cea1..880135a 100644
--- a/src/mesh.rs
+++ b/src/mesh.rs
@@ -1,5 +1,6 @@
-//! The geometry every reader produces: a triangle mesh with a colour per
-//! triangle and, when the file has them, a colour per corner.
+//! The geometry every reader produces: a triangle mesh with a material per
+//! triangle and, when the file has them, a colour, a texture coordinate and a
+//! normal per corner.
 //!
 //! ## Why meshes are welded
 //!