Merge pull request kubernetes-sigs#10105 from k8s-infra-cherrypick-robot/cherry-pick-10100-to-release-1.6

[release-1.6] 📖 Update reference to clusterctl config file

Author: k8s-ci-robot

docs/book/src/user/quick-start.md

@@ -708,7 +708,8 @@ clusterctl init --infrastructure outscale
 
 {{#tab Proxmox}}
 
-First, we need to add the IPAM provider to your clusterctl config file `~/.cluster-api/clusterctl.yaml`:
+First, we need to add the IPAM provider to your [clusterctl config file](../clusterctl/configuration.md) (`$XDG_CONFIG_HOME/cluster-api/clusterctl.yaml`):
+
 ```yaml
 providers:
   - name: in-cluster