Merge pull request #27999 from pleiadesian/patch-1

Fix typo in secret.md

Author: k8s-ci-robot

content/en/docs/concepts/configuration/secret.md

@@ -328,7 +328,7 @@ kubectl create secret tls my-tls-secret \
   --key=path/to/key/file
 ```
 
-The public/private key pair must exist before hand. The public key certificate
+The public/private key pair must exist beforehand. The public key certificate
 for `--cert` must be .PEM encoded (Base64-encoded DER format), and match the
 given private key for `--key`.
 The private key must be in what is commonly called PEM private key format,