Publish commit(s) from site source repo:
  f58899f7e [site] update site for Kudu 1.12.0 release
  dd55c6ad6 [site] Change top nav downloads tab to releases
  1c6b5116a [site] add Yifan Zhang to the committers page

Site-Repo-Commit: f58899f7e4fadf4183f3e7a59400ceb1f07145a3
1253 files changed