reminder: softfreeze in a fortnight

[Peter Maydell]

Early reminder that softfreeze will be on the 13th July, in just
over two weeks' time. Please make sure that any feature work for
the 6.1 release has made it into a sub-maintainer pull request on
the list by that time.

If maintainers could avoid all sending their pull requests on
the day of softfreeze that would also be helpful -- it takes
at least an hour for a merge and test, so the number of pullreqs
I can process in a day is obviously limited...

thanks
-- PMM