ci: Fix benchmark build

Author: hellobertrand

.github/workflows/benchmark.yml

@@ -41,12 +41,9 @@ jobs:
 
       - name: Copy Lib ZXC
         run: |
-          mkdir -p ${LZBENCH_DIR}/lz/zxc/include/
-          mkdir -p ${LZBENCH_DIR}/lz/zxc/src/lib/
+          rm -rf ${LZBENCH_DIR}/lz/zxc/{include,src}
+          cp -r include src ${LZBENCH_DIR}/lz/zxc/
 
-          cp include/* ${LZBENCH_DIR}/lz/zxc/include/
-          cp src/lib/* ${LZBENCH_DIR}/lz/zxc/src/lib/
-  
       - name: Build Lzbench
         working-directory: ${{ env.LZBENCH_DIR }}
         run: |