Update rustup to 1.25.0 in the CI
There's a new release of rustup, 1.25.0 - we should update ci/install-rust.sh
with that number.
Steps:
- Update the
RUSTUP_VERSION
inci/install-rust.sh
- Update the
BASE_TAG
inci/container-builds.yml
- ... that should be all?
(We should probably update the RUST_STABLE
version in ci/container-builds.yml
at the same time.)