clusterizer: Mark meshopt_optimizeMeshlet as stable

No future changes to the interface are expected. It's unclear if we will
need more variants of this algorithm in the future (to optimize for
RT?), but if we do they can be added as separate functions.

Author: zeux

src/meshoptimizer.h

@@ -568,14 +568,14 @@ MESHOPTIMIZER_API size_t meshopt_buildMeshletsBound(size_t index_count, size_t m
 MESHOPTIMIZER_API size_t meshopt_buildMeshletsFlex(struct meshopt_Meshlet* meshlets, unsigned int* meshlet_vertices, unsigned char* meshlet_triangles, const unsigned int* indices, size_t index_count, const float* vertex_positions, size_t vertex_count, size_t vertex_positions_stride, size_t max_vertices, size_t min_triangles, size_t max_triangles, float cone_weight, float split_factor);
 
 /**
- * Experimental: Meshlet optimizer
+ * Meshlet optimizer
  * Reorders meshlet vertices and triangles to maximize locality to improve rasterizer throughput
  *
  * meshlet_triangles and meshlet_vertices must refer to meshlet triangle and vertex index data; when buildMeshlets* is used, these
  * need to be computed from meshlet's vertex_offset and triangle_offset
  * triangle_count and vertex_count must not exceed implementation limits (vertex_count <= 255 - not 256!, triangle_count <= 512)
  */
-MESHOPTIMIZER_EXPERIMENTAL void meshopt_optimizeMeshlet(unsigned int* meshlet_vertices, unsigned char* meshlet_triangles, size_t triangle_count, size_t vertex_count);
+MESHOPTIMIZER_API void meshopt_optimizeMeshlet(unsigned int* meshlet_vertices, unsigned char* meshlet_triangles, size_t triangle_count, size_t vertex_count);
 
 struct meshopt_Bounds
 {