tests: Fix incorrect doc-string in test_hello_se.py

Change-Id: Ic21e59cfc8fba92f93661d8b33803bd4c4c6fc58
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/62011
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed