Update build.yml

Author: bnaras

.github/workflows/build.yml

@@ -35,9 +35,11 @@ jobs:
           - openblas
     steps:
       - uses: actions/checkout@v4
+      - run: brew install gcc@13      
       - run: rustup toolchain install stable --profile=minimal
       - run: cargo test --features=${{ matrix.feature }}
         env:
+          CC: "$(brew --prefix gcc@13)/bin/gcc-13"
           FC: "$(brew --prefix gcc@13)/bin/gfortran-13"
           LIBRARY_PATH: "$(brew --prefix gcc@13)/lib/gcc/13"