try to fix docs

Maximilian-Stefan-Ernst · Maximilian-Stefan-Ernst · commit ece695b4b661 · 2026-01-31T13:23:19.000+01:00
diff --git a/docs/src/tutorials/concept.md b/docs/src/tutorials/concept.md
@@ -104,7 +104,7 @@ SemConstant
 SemOptimizer
 ```
 
-A reference: [NLopt engine](@ref Base.get_extension(StructuralEquationModels, :SEMNLOptExt).SemOptimizerNLopt)
+A reference: [NLopt engine](@ref SEMNLOptExt.SemOptimizerNLopt)
 
 ```@autodocs
 Modules = [
