Update ToMath.md

content/en/functions/transform/ToMath.md

@@ -94,7 +94,7 @@ There are 3 ways to handle errors from KaTeX:
 
 1. Let KaTeX throw an error and make the build fail. This is the default behavior.
 1. Handle the error in your template. See the render hook example below.
-1. Set the `throwOnError` option to `false` to make KaTeX render the expression as an error instead of throwing an error. See [options].
+1. Set the `throwOnError` option to `false` to make KaTeX render the expression as an error instead of throwing an error. See [options](#options).
 
 {{< code file=layouts/_default/_markup/render-passthrough-inline.html copy=true >}}
 {{ with transform.ToMath .Inner }}