Merge pull request #42279 from Katee/fixup-which-command

Use correct `which` command instead of non-existent `where`

Author: k8s-ci-robot

content/en/docs/tasks/tools/install-kubectl-macos.md

@@ -280,7 +280,7 @@ Depending on how you installed `kubectl`, use one of the following methods.
 1.  Locate the `kubectl` binary on your system:
 
     ```bash
-    where kubectl
+    which kubectl
     ```
 
 1.  Remove the `kubectl` binary: