Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1605

Fixes a regression introduced in ccb85b31a4. The
`docker.io/devture/email2matrix:1.0.2` container image was faulty due to
this 49f966d6cc

1.0.2 is the first container image tag that is available as a multi-arch image
with support for linux/amd64, linux/arm64/v8 (arm64) and linux/arm/v7 (arm32),
so self-building is no longer necessary on all these platforms.

Signed-off-by: Ahmad Haghighi <haghighi@fedoraproject.org>

This is both for consistency with 93cc71cb69976c
and for making things more obvious.