Add Schenker to the user list

[amirkkn]

Please ensure your pull request adheres to the following guidelines:

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Fixes: #issue-number

<!-- Enter the release note text here if needed or remove this section! -->

[maintainer-s-little-helper]

Commit de7f8624368652982fe5738160943e15aade6b8c does not match "(?m)^Signed-off-by:".

Please follow instructions provided in https://docs.cilium.io/en/stable/contributing/development/contributing_guide/#developer-s-certificate-of-origin

[xmulligan]

Thanks for the addition @amirkkn !

Would you mind signing off your commit so we can merge it? https://docs.cilium.io/en/stable/contributing/development/contributing_guide/#dev-coo

[amirkkn]

Updated! Thanks @xmulligan

[xmulligan]

Thanks! Looks good to me now

[youngnick]

Skipping CI because docs update.