For loops leak secrets

[Brownies]

The "Iteration" element leaks secrets if the iterable has a string representation of its contents. Minimal example:

*** Settings ***
Library         CryptoLibrary    password=password    variable_decryption=True    key_path=${CURDIR}

*** Variables ***
${secret}    crypt:BBsNlqXK9n/b8khTf02uJu0dehTe32DXUwbPMQqAYlMvu+2uCw3/RJKPjXDMcUhmyVfn2wh3Z97/frezmmstEOwg

*** Test Cases ***
Sample
    VAR    @{list}    ${secret}
    FOR    ${element}    IN    @{list}
        No Operation
    END

This results in

Private key for decrypting the "secret": private_key.json

Tested with robotframework 7.0.1 and robotframework-crypto 0.3.0

[Snooz82]

Is fixed in 0.4.2