Add a TODO

sparse_strips/vello_hybrid/src/render/webgl/mod.rs

diff --git a/sparse_strips/vello_hybrid/src/render/webgl/mod.rs b/sparse_strips/vello_hybrid/src/render/webgl/mod.rs
index 69df5d2..13971a0 100644
--- a/sparse_strips/vello_hybrid/src/render/webgl/mod.rs
+++ b/sparse_strips/vello_hybrid/src/render/webgl/mod.rs
@@ -2340,6 +2340,7 @@
     let encoded_paints_texture_fs_name = render::fragment::ENCODED_PAINTS_TEXTURE;
     let encoded_paints_texture_vs_name = render::vertex::ENCODED_PAINTS_TEXTURE;
     let gradient_texture_name = render::fragment::GRADIENT_TEXTURE;
+    // TODO: Change it so this is based on `EXTERNAL_TEXTURE_SLOT_COUNT`.
     let external_texture_names = [
         render::fragment::EXTERNAL_TEXTURE_0,
         render::fragment::EXTERNAL_TEXTURE_1,