Fix comment

servers/visual/rasterizer_rd/rasterizer_canvas_rd.cpp

@@ -1550,7 +1550,8 @@ void RasterizerCanvasRD::canvas_render_items(RID p_to_render_target, Item *p_ite
 				if (md->last_frame != RasterizerRD::get_frame_number()) {
 					md->last_frame = RasterizerRD::get_frame_number();
 					if (!RD::get_singleton()->uniform_set_is_valid(md->uniform_set)) {
-						//textures may have been removed, hence invalidating this uniform set.
+						// uniform set may be gone because a dependency was erased. In this case, it will happen
+						// if a texture is deleted, so just re-create it.
 						storage->material_force_update_textures(ci->material, RasterizerStorageRD::SHADER_TYPE_2D);
 					}
 				}