Make use of setup-gfortran for macOS

Author: IvanUkhov

.github/workflows/build.yml

@@ -35,12 +35,11 @@ jobs:
           - openblas
     steps:
       - uses: actions/checkout@v4
+      - uses: fortran-lang/setup-fortran@v1
+        with:
+          compiler: gcc
       - run: rustup toolchain install stable --profile=minimal
       - run: cargo test --features=${{ matrix.feature }}
-        env:
-          CC: gcc-12
-          FC: gfortran-12
-          LIBRARY_PATH: /usr/local/opt/gcc@12/lib/gcc/12
 
   test-ubuntu:
     runs-on: ubuntu-latest