Install dependencies script fails on Windows/MSYS2 (package name changed)

Summary:

The install dependencies script aborts prematurely, since the name of the package for gtkmm has changed. The fix is to search for "gtkmm4" in msys2installdeps.sh and replace it with "gtkmm-4.0"

Steps to reproduce:

• Download zip file from here: https://gitlab.com/inkscape/inkscape/-/archive/master/inkscape-master.zip?path=buildtools
• Extract zip file
• Double-click on windows-deps-clickHere.bat
• Follow instructions on step 2 in Section Installing Build Dependencies Easily on https://gitlab.com/inkscape/inkscape/-/blob/master/doc/building/windows.md

What happened?

Script complains about not being able to install package mingw-w64-ucrt-x86_64-gtkmm4 and aborts

What should have happened?

Script runs to the end, having installed MSYS2 and all dependencies needed to compile Inkscape

Version info

npt applicable