hydra/release.nix: posthook -> postdist

Dependencies

• [2] QK2OXCKP hydra/release.nix: move manual to tarball build, restore version in store path for tarball build
• [3] UHMUHQMU hydra: fix tarball build, add pre suffix to tarballs
• [*] T4LLYESZ * Nix expression for building Hydra.

Change contents

• replacement in release.nix at line 25
  [2.126]→[2.126:146](∅→∅)
  − postHook = ''
  [2.126]

  [2.146]
  + postDist = ''