Update and correct release schedule:

Update and correct release schedule:

* The release schedule had the dates for some releases twice
  and they weren't the same. Ricardo Signes released 5.24.0 sooner
  than on the schedule (good thing, since we kept slipping away)
  so that's fixed.

* We're releasing 5.25.1 tomorrow, on May, instead of June. That
  means all numbers are bumped.

* Aaron Crane volunteered to take on the November release.
  (Joke's on him, he'll have to do it!)