[MacOS] Update LLVM

Author: snailspeed3

.github/workflows/cmake.yml

@@ -139,7 +139,7 @@ jobs:
     - name: CMake -- configure
       shell: bash
       working-directory: ${{github.workspace}}/build
-      run: cmake $GITHUB_WORKSPACE -GNinja -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DRust_CARGO_TARGET=aarch64-apple-darwin -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=/opt/homebrew/Cellar/llvm/19.1.5/bin/clang++
+      run: cmake $GITHUB_WORKSPACE -GNinja -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DRust_CARGO_TARGET=aarch64-apple-darwin -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=/opt/homebrew/Cellar/llvm/20.1.4/bin/clang++
 
     - name: CMake -- build
       working-directory: ${{github.workspace}}/build