chore(ci): Fix benchmark workflow

.github/workflows/benchmark.yml

@@ -16,7 +16,7 @@ on:
         options:
           - cpu
           - gpu
-      benchmark_name:
+      benchmark-name:
         description: 'Benchmark name'
         required: true
         default: 'standard'
@@ -40,6 +40,7 @@ env:
   CUDA_PATH: /usr/local/cuda-11.3
   GCC_VERSION: 8
   BACKEND: ${{ inputs.backend || 'cpu' }}
+  BENCHMARK_NAME: ${{ inputs.benchmark-name || 'standard' }}
 
 jobs:
   start-runner:
@@ -142,9 +143,9 @@ jobs:
           echo "CUDACXX=$CUDA_PATH/bin/nvcc" >> "${GITHUB_ENV}"
 
       - name: Setup environment variable for benchmark target
-        if: ${{ env.BENCHMARK_NAME != 'standard' }}
+        if: ${{ inputs.benchmark-name != 'standard' }}
         run: |
-          echo "BENCHMARK_TARGET=${{ env.BENCHMARK_TARGET }}-${{ env.BENCHMARK_NAME }}" >> "${GITHUB_ENV}"
+          echo "BENCHMARK_TARGET=${{ env.BENCHMARK_TARGET }}-${{ inputs.benchmark-name }}" >> "${GITHUB_ENV}"
 
       - name: Install rust
         uses: actions-rs/toolchain@v1