Fix link to be followed bash upgrade for macos

Author: Mujib-Ahasan

content/en/docs/tasks/tools/included/optional-kubectl-configs-bash-mac.md

@@ -22,7 +22,7 @@ There are two versions of bash-completion, v1 and v2. V1 is for Bash 3.2
 script **doesn't work** correctly with bash-completion v1 and Bash 3.2.
 It requires **bash-completion v2** and **Bash 4.1+**. Thus, to be able to
 correctly use kubectl completion on macOS, you have to install and use
-Bash 4.1+ ([*instructions*](https://itnext.io/upgrading-bash-on-macos-7138bd1066ba)).
+Bash 4.1+ ([*instructions*](https://apple.stackexchange.com/a/292760)).
 The following instructions assume that you use Bash 4.1+
 (that is, any Bash version of 4.1 or newer).
 {{< /warning >}}