Sync file permissions

Git can track executable (0755) and non-executable (0644) file modes.
This is a minor file permissions sync for the win32/build/mkico.sh
(0755).

[skip

Sync file permissions

Git can track executable (0755) and non-executable (0644) file modes.
This is a minor file permissions sync for the win32/build/mkico.sh
(0755).

[skip ci]

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Build/Windows: Update the Windows icon as svg and build derivatives from it

Co-Authored-By: Nurudin Imsirovic <realnurudinimsirovic@gmail.com>

Closes GH-14964.