fix(ci): Fix LIBCLANG_PATH escaping in GitHub Actions workflow

Author: wysaid

.github/workflows/rust.yml

@@ -52,7 +52,7 @@ jobs:
 
     - name: Install system dependencies (macOS)
       if: matrix.os == 'macos-latest'
-      run: brew install cmake
+      run: brew install cmake llvm
 
     - name: Install Rust toolchain
       uses: actions-rust-lang/setup-rust-toolchain@v1
@@ -96,13 +96,13 @@ jobs:
     - name: Build Rust bindings
       working-directory: bindings/rust
       env:
-        LIBCLANG_PATH: ${{ runner.os == 'Windows' && 'C:\Program Files\LLVM\bin' || '' }}
+        LIBCLANG_PATH: ${{ runner.os == 'Windows' && 'C:\\Program Files\\LLVM\\bin' || '' }}
       run: cargo build --verbose --features static-link
 
     - name: Run tests
       working-directory: bindings/rust
       env:
-        LIBCLANG_PATH: ${{ runner.os == 'Windows' && 'C:\Program Files\LLVM\bin' || '' }}
+        LIBCLANG_PATH: ${{ runner.os == 'Windows' && 'C:\\Program Files\\LLVM\\bin' || '' }}
       run: cargo test --verbose --features static-link
 
   # Job 2: Source Build (Distribution Mode)