Merge pull request #52568 from dkarczmarski/fix-typo-content-en-docs-reference-_index.md

fix: remove unnecessary "and"

Author: k8s-ci-robot

content/en/docs/reference/_index.md

@@ -76,7 +76,7 @@ operator to use or manage a cluster.
 
 * [kubeconfig (v1)](/docs/reference/config-api/kubeconfig.v1/)
 * [kuberc (v1alpha1)](/docs/reference/config-api/kuberc.v1alpha1/) and
-  [kuberc (v1beta1)](/docs/reference/config-api/kuberc.v1beta1/) and
+  [kuberc (v1beta1)](/docs/reference/config-api/kuberc.v1beta1/)
 * [kube-apiserver admission (v1)](/docs/reference/config-api/apiserver-admission.v1/)
 * [kube-apiserver configuration (v1alpha1)](/docs/reference/config-api/apiserver-config.v1alpha1/) and
   [kube-apiserver configuration (v1beta1)](/docs/reference/config-api/apiserver-config.v1beta1/) and