Release notes for Boost 1.76.0

From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2021-03-11 16:43:05

FYI, we are not releasing any fixes or features with 1.76.0
In the notes, I just carried over the C++14 notice.

https://github.com/boostorg/website/pull/605

Comments, corrections are welcome.

We surely will release lots of new stuff with the next Boost release.

Thanks all for your work!

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net