Merge pull request #6235 from mmahrouss/patch-1

📖 Docs fix, duplicated ```yaml

Author: k8s-ci-robot

docs/book/src/clusterctl/configuration.md

@@ -75,8 +75,6 @@ cert-manager:
 
 For situations when resources are limited or the network is slow, the cert-manager wait time to be running can be customized by adding a field to the clusterctl config file, for example:
 
-```yaml
-
 ```yaml
 cert-manager:
   ...