Merge pull request #42671 from Arhell/en-typo

Fix typo

Author: k8s-ci-robot

content/en/docs/concepts/security/secrets-good-practices.md

@@ -111,6 +111,6 @@ data encoded as base64, sharing this file or checking it in to a source
 repository means the secret is available to everyone who can read the manifest.
 
 {{< caution >}}
-Base64 encoding is _not_ an encryption method, it provides no additiona
+Base64 encoding is _not_ an encryption method, it provides no additional
 confidentiality over plain text.
 {{< /caution >}}