[ANNOUNCE] Weston 9.0 release schedule

[Simon Ser]

Hi all,

Here is the release schedule for Weston 9.0, the next major version:

- Alpha: July 30th, in 4 weeks
- Beta: August 13th
- RC1: August 27th
- First possible release: September 3rd

Package maintainers are encouraged to pick up the pre-releases to make
sure packaging can be tested (and fixed) before the stable release.

Let me know if there's something in particular you want merged for 9.0.

Thanks,

Simon Ser