Latest goreleaser deprecates archives.replacements

[JeremyGHutchins]

I needed to build the code for ppc64le, but it seems that the latest goreleaser does not support the archives.replacements as it is removed in goreleaser 1.19. I get the following error when running goreleaser --debug build...

   ⨯ build failed after 0s                    error=yaml: unmarshal errors:
  line 30: field replacements not found in type config.Archive

See here for details. Should be a relatively straight forward fix, but not sure if it affects anything else.