The phrase "to accompany this release" means that something is being included or provided alongside a particular release or announcement. Full definition
When a check doesn't accompany the release, we usually receive the settlement check within two weeks of delivering the executed release. (nycdivorcelawyers.com)
In his media statement accompanying the release of the modelling, Environment Minister David Kemp distanced the Government from the new evidence, claiming the work it commissioned only addresses «a limited set of the issues». (clivehamilton.com)
A new story trailer and an updated demo version (available on SteamTM) accompany the release date announcement. (inside-indie.org)