SW-20441 - Update UPGRADE-5.3.md
SW-20441 - Update UPGRADE-5.3.md

philippmahlow/shopware,oktupol/shopware,philippmahlow/shopware,k10r/shopware,simkli/shopware,oktupol/shopware,jochenmanz/shopware,oktupol/shopware,jochenmanz/shopware,jochenmanz/shopware,philippmahlow/shopware,k10r/shopware,simkli/shopware,simkli/shopware,k10r/shopware,jochenmanz/shopware,jochenmanz/shopware,oktupol/shopware,oktupol/shopware,simkli/shopware,philippmahlow/shopware,philippmahlow/shopware,simkli/shopware,k10r/shopware,k10r/shopware