Merge pull request #6034 from k8s-infra-cherrypick-robot/cherry-pick-6030-to-release-1.0

📖 book: Use relative links in generate CRDs doc

Author: k8s-ci-robot

docs/book/src/developer/providers/implementers-guide/generate_crds.md

@@ -83,11 +83,11 @@ make manifests
 
 The cluster API CRDs should be further customized:
 
-- [Apply the contract version label to support conversions](https://cluster-api.sigs.k8s.io/developer/providers/v1alpha2-to-v1alpha3.html#apply-the-contract-version-label-clusterx-k8sioversion-version1_version2_version3-to-your-crds)
-- [Upgrade to CRD v1](https://cluster-api.sigs.k8s.io/developer/providers/v1alpha2-to-v1alpha3.html#upgrade-to-crd-v1)
-- [Set “matchPolicy=Equivalent” kubebuilder marker for webhooks](https://cluster-api.sigs.k8s.io/developer/providers/v1alpha2-to-v1alpha3.html#add-matchpolicyequivalent-kubebuilder-marker-in-webhooks)
-- [Refactor the kustomize config folder to support multi-tenancy](https://cluster-api.sigs.k8s.io/developer/providers/v1alpha2-to-v1alpha3.html#refactor-kustomize-config-folder-to-support-multi-tenancy-when-using-webhooks)
-- [Ensure you are compliant with the clusterctl provider contract](https://cluster-api.sigs.k8s.io/clusterctl/provider-contract.html#components-yaml)
+- [Apply the contract version label to support conversions](../v1alpha2-to-v1alpha3.md#apply-the-contract-version-label-clusterx-k8sioversion-version1_version2_version3-to-your-crds)
+- [Upgrade to CRD v1](../v1alpha2-to-v1alpha3.md#upgrade-to-crd-v1)
+- [Set “matchPolicy=Equivalent” kubebuilder marker for webhooks](../v1alpha2-to-v1alpha3.md#add-matchpolicyequivalent-kubebuilder-marker-in-webhooks)
+- [Refactor the kustomize config folder to support multi-tenancy](../v1alpha2-to-v1alpha3.md#refactor-kustomize-config-folder-to-support-multi-tenancy-when-using-webhooks)
+- [Ensure you are compliant with the clusterctl provider contract](../../../clusterctl/provider-contract.md#components-yaml)
 
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