fix typo

[appleboy]

See https://goreportcard.com/report/github.com/gaia-pipeline/gaia#misspell

[Skarlso]

The vault test is a weird side effect of relying on block decrypt throwing an error when it can't decrypt the secret because the password doesn't match the block size of the original password that was used.

This basically happens because we don't know the password and don't check the decrypted content for a key string to see of the decryption was successful or not.

It can happen that the library still successfully decrypts but the content wouldn't be what was expected so a different error would happen elsewhere.

I'll make this stronger by inserting a specific string alongside the encrypted text something like <SUCCESS> that I can look up and see if the decryption was successful.