[CI] do not use hardcoded path but brew prefix llvm location

Author: the-hampel

.github/workflows/build.yml

@@ -98,7 +98,7 @@ jobs:
         echo "PYTHONPATH=$(brew --prefix llvm)/lib/python3.13/site-packages" >> $GITHUB_ENV
         echo "SDKROOT=$(xcrun --show-sdk-path)" >> $GITHUB_ENV
         echo "CPPFLAGS=-I$(brew --prefix libomp)/include $CPPFLAGS" >> $GITHUB_ENV
-        echo "LDFLAGS=-L$(brew --prefix libomp)/lib -L$(brew --prefix llvm)/lib/c++ -L/opt/homebrew/opt/llvm/lib/unwind -lunwind" >> $GITHUB_ENV
+        echo "LDFLAGS=-L$(brew --prefix libomp)/lib -L$(brew --prefix llvm)/lib/c++ -L$(brew --prefix llvm)/lib/unwind -lunwind" >> $GITHUB_ENV
 
     - name: Add clang CXXFLAGS
       if: ${{ contains(matrix.cxx, 'clang') }}