Fix 1.52 builds
With the 1.61 experiments (!277 (closed)) I uploaded new Rust and LLVM packages to my repo, which break the current build.
This PR pins the Rust version for mb2 to 1.52
With the 1.61 experiments (!277 (closed)) I uploaded new Rust and LLVM packages to my repo, which break the current build.
This PR pins the Rust version for mb2 to 1.52