Fix bug on hop run

[sfermigier]

❯ hop run flask
Traceback (most recent call last):
  File "/home/hop3/venv/bin/hop-agent", line 8, in <module>
    sys.exit(main())
  File "/home/hop3/venv/lib/python3.10/site-packages/hop3/main.py", line 60, in main
    cli(args=args)
  File "/home/hop3/venv/lib/python3.10/site-packages/hop3/cli/main.py", line 36, in __call__
    main(args)
  File "/home/hop3/venv/lib/python3.10/site-packages/hop3/cli/main.py", line 72, in main
    func(**kwargs)
  File "/home/hop3/venv/lib/python3.10/site-packages/hop3/cli/apps.py", line 128, in run
    p = subprocess.Popen(
  File "/usr/lib/python3.10/subprocess.py", line 971, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.10/subprocess.py", line 1863, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'flask'