update generating crd link (#2277)

Author: pravarag

docs/book/src/reference/markers/crd.md

@@ -4,6 +4,6 @@ These markers describe how to construct a custom resource definition from
 a series of Go types and packages.  Generation of the actual validation
 schema is described by the [validation markers](./crd-validation.md).
 
-See [Generating CRDs](/reference/generating-crd.md) for examples.
+See [Generating CRDs](../generating-crd.md) for examples.
 
 {{#markerdocs CRD}}