ci: FC needs specific version

Author: scivision

.github/workflows/ci.yml

@@ -84,7 +84,7 @@ jobs:
     env:
       CC: clang-${{ matrix.clang-version }}
       CXX: clang++-${{ matrix.clang-version }}
-      FC: gfortran
+      FC: gfortran-14
 
     steps:
     - uses: actions/checkout@v4