Fix microos typo

[jreidinger]

Problem

There is a crash in microos installation caused by the last change in #1125.

Solution

Fix the typo

Testing

• Tested manually using rake run[inst_microos_role] to verify that it will show proper dialog.

[coveralls]

coverage: 40.922%. remained the same when pulling f63ef4ebecea7e05c2a37833f65fa3e5815a652b on fix_microos_typo into 9f8db63a4a3d4c31b0a6f8b2d20bb504813b44d0 on master.

[github-actions[bot]]

:white_check_mark: Autosubmission job #11373518926 successfully finished :white_check_mark: Created submit request #1208512