fix: link to memcached_controller.go
Fix the link to memcached_controller.go to point to master.
@@ -466,7 +466,7 @@ Next, check out the following:
[generating-crd]: https://book.kubebuilder.io/reference/generating-crd.html
[markers]: https://book.kubebuilder.io/reference/markers.html
[crd-markers]: https://book.kubebuilder.io/reference/markers/crd-validation.html
-[memcached_controller]: https://github.com/operator-framework/operator-sdk/blob/v1.3.0/testdata/go/v3/memcached-operator/controllers/memcached_controller.go
+[memcached_controller]: https://github.com/operator-framework/operator-sdk/blob/latest/testdata/go/v3/memcached-operator/controllers/memcached_controller.go
[builder_godocs]: https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/builder#example-Builder
[activate_modules]: https://github.com/golang/go/wiki/Modules#how-to-install-and-activate-module-support
[advanced-topics]: /docs/building-operators/golang/advanced-topics/
