Updated release notes for v2.12.4
Updated release notes for v2.12.4

rjkip/OpenConext-engineblock,Martin1982/OpenConext-engineblock,remold/OpenConext-engineblock,Martin1982/OpenConext-engineblock,thijskh/OpenConext-engineblock,Martin1982/OpenConext-engineblock,rjkip/OpenConext-engineblock,thijskh/OpenConext-engineblock,remold/OpenConext-engineblock,rjkip/OpenConext-engineblock,remold/OpenConext-engineblock,Martin1982/OpenConext-engineblock,rjkip/OpenConext-engineblock,thijskh/OpenConext-engineblock,remold/OpenConext-engineblock,thijskh/OpenConext-engineblock