Fix a IndentationError

[WjMessi1]

Error Log

I encountered a bug when running the command: python human_eval/execution.py

File "/data/humaneval/human-eval/human_eval/execution.py", line 59
    result.append("passed")
IndentationError: expected an indented block

Fix it

[ramkrishna2910]

Uncommenting line 58 should resolve this issue.