CI: use LF master

Author: cmnrd

.github/workflows/ci.yml

@@ -23,7 +23,6 @@ jobs:
     uses: lf-lang/benchmarks-lingua-franca/.github/workflows/benchmark-tests.yml@main
     with:
       target: 'Rust'
-      compiler-ref: 'rust-childref-multi'
   ts-benchmark-tests:
     uses: lf-lang/benchmarks-lingua-franca/.github/workflows/benchmark-tests.yml@main
     with: