[coreboot] coreboot 4.18 release planned for October 5th

[Zeh, Werner]

Dear coreboot community.

According to our schedule for releases we are a bit behind now and therefore
we would like to announce that the next release will happen in two weeks
from now on 5th October 2022.

So please test the current tree as much as you can do and avoid introducing
new heavy features until we publish 4.18.

Thanks

Werner & Martin