Remove executable bit from connectdlg

[ann0see]

Short description of changes

Removes executable bit from connectdlg.cpp. Not sure why it was executable in the first place. This was introduced in d5d1ab0

CHANGELOG: SKIP
Context: Fixes an issue?

No. This was fixed by 38fb414#r1749287067 by me

Does this change need documentation? What needs to be documented and how?

No

Status of this Pull Request

Ready for review

What is missing until this pull request can be merged?

Nothing

Checklist

• I've verified that this Pull Request follows the general code principles
• I tested my code and it does what I want (it still compiles)
• My code follows the style guide
• I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• I've filled all the content above