Invalid Signature Kali Linux update Fixed

Invalid Signature Kali Linux update Fixed

If you don’t update Kali regularly, then your archive-keyring package is outdated, and you’ll get key mismatches when working with Kali Linux repositories.
So when one try to execute command sudo apt-get update will get error as below:
W: Failed to fetch The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository

How to apply fix:
wget -q -O - | apt-key add

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