fix: use unique artifacts json depending on target

.github/workflows/benchmarks.yml

@@ -172,13 +172,13 @@ jobs:
             --zkvyper './target-zkvyper/release/zkvyper' \
             --path=${{ inputs.compiler_llvm_benchmark_path || '' }} \
             --mode="${MODE}" \
-            --benchmark=${{ matrix.type }}.json
+            --benchmark=${{ matrix.type }}${{ inputs.target-machine }}.json
 
       - uses: actions/upload-artifact@v4
         if: always()
         with:
           name: compiler-llvm-${{ matrix.type }}-benchmark-${{ inputs.target-machine }}
-          path: ${{ matrix.type }}.json
+          path: ${{ matrix.type }}${{ inputs.target-machine }}.json
 
   analysis:
     name: "Benchmark comparison"
@@ -205,7 +205,9 @@ jobs:
       - name: Comparing the LLVM framework benchmark results
         run: |
           cargo run --release --bin benchmark-analyzer -- \
-            --reference reference.json --candidate candidate.json --output-file result.txt
+            --reference reference${{ inputs.target-machine }}.json \
+            --candidate candidate${{ inputs.target-machine }}.json \
+            --output-file result.txt
 
       - name: Posting the LLVM benchmark results to the summary
         run: |