I changed my fstab from
UUID=a936dbe9-5ab5-4272-aaae-d22030824373 / ext4 errors=remount-ro 0 1
to
UUID=a936dbe9-5ab5-4272-aaae-d22030824373 / ext4 rw,errors=remount-ro 0 1
and it now boots fine again. I don't know why that is necessary now and why the update didn't notify me or made the change automatically.
I changed my fstab from
UUID=a936dbe9- 5ab5-4272- aaae-d220308243 73 / ext4 errors=remount-ro 0 1
to
UUID=a936dbe9- 5ab5-4272- aaae-d220308243 73 / ext4 rw,errors= remount- ro 0 1
and it now boots fine again. I don't know why that is necessary now and why the update didn't notify me or made the change automatically.