Publishes a pre-built Ubuntu Jammy Docker image containing the RISC-V GNU Compiler Toolchain for use by https://github.com/runtimeverification/riscv-semantics.
The resulting image runtimeverificationinc/riscv-gnu-toolchain:ubuntu-jammy-${VERSION} contains the toolchain binaries under /opt/riscv/bin and is built with the Newlib --multilib configuration, where ${VERSION} is specified in version.