fix ci

Author: fogInSingularity

.github/workflows/workflow.yaml

@@ -64,6 +64,10 @@ jobs:
           name: riscv-sim-${{ matrix.compiler_name }}-${{ matrix.build_type }}
           path: build
 
+      - name: make sim executable
+        run: |
+          chmod +x build/riscv-sim.x
+
       - name: clone risc-v tests
         if: matrix.compiler_name == 'clang'
         run: |