enh: Adding a caution for external tool (#18002)

* Adding a caution for external tool

* Update content/en/docs/tasks/inject-data-application/distribute-credentials-secure.md

Co-Authored-By: Zach Corleissen <zacharysarah@users.noreply.github.com>

content/en/docs/tasks/inject-data-application/distribute-credentials-secure.md

@@ -32,6 +32,10 @@ echo -n '39528$vdg7Jb' | base64
 The output shows that the base-64 representation of your username is `bXktYXBw`,
 and the base-64 representation of your password is `Mzk1MjgkdmRnN0pi`.
 
+{{< caution >}}
+Use a local tool trusted by your OS to decrease the security risks of external tools.
+{{< /caution >}}
+
 ## Create a Secret
 
 Here is a configuration file you can use to create a Secret that holds your
@@ -230,4 +234,3 @@ This functionality is available in Kubernetes v1.6 and later.
 
 {{% /capture %}}
 
-