Update MultiNamespacedCacheBuilder link for OSDK tutorial

Author: adellape

modules/osdk-golang-manager.adoc

@@ -22,7 +22,7 @@ By default, the Manager watches the namespace where the Operator runs. To watch
 mgr, err := ctrl.NewManager(cfg, manager.Options{Namespace: ""})
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-You can also use the link:https://godoc.org/github.com/kubernetes-sigs/controller-runtime/pkg/cache#MultiNamespacedCacheBuilder[`MultiNamespacedCacheBuilder`] function to watch a specific set of namespaces:
+You can also use the link:https://pkg.go.dev/github.com/kubernetes-sigs/controller-runtime@v0.2.0-alpha.0/pkg/cache#MultiNamespacedCacheBuilder[`MultiNamespacedCacheBuilder`] function to watch a specific set of namespaces:
 
 [source,go]
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