Merge pull request #30282 from aserputov/issue-30281

Fix: typo in install-kubeadm.md

Author: k8s-ci-robot

content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

@@ -69,7 +69,7 @@ For more details please see the [Network Plugin Requirements](/docs/concepts/ext
 ## Check required ports
 These
 [required ports](/docs/reference/ports-and-protocols/)
-need to be open in order for Kubernetes components to communicate with each other. You can use `telnet` to check if a port is open. for example:
+need to be open in order for Kubernetes components to communicate with each other. You can use telnet to check if a port is open. For example:
 
 ```shell
 telnet 127.0.0.1 6443