update release managers

I'm not in the DEB/RPM rotation at Google anymore after switching teams earlier this year.
Juan Escobar is not in the rotation anymore.
Ben Kazemi is.

Author: BenTheElder

content/en/releases/release-managers.md

@@ -173,9 +173,8 @@ of each minor (1.Y) and patch (1.Y.Z) release
 GitHub team: [@kubernetes/build-admins](https://github.com/orgs/kubernetes/teams/build-admins)
 
 - Aaron Crickenberger ([@spiffxp](https://github.com/spiffxp))
-- Benjamin Elder ([@BenTheElder](https://github.com/BenTheElder))
+- Ben Kazemi ([@BenjaminKazemi](https://github.com/BenjaminKazemi))
 - Grant McCloskey ([@MushuEE](https://github.com/MushuEE))
-- Juan Escobar ([@juanfescobar](https://github.com/juanfescobar))
 
 ## SIG Release Leads