GH Actions: build wxWidgets statically

[Be-ing]

attempt to fix #542

Checklist

• I have signed off my commits using -s or Signed-off-by* (See: Contributing § DCO)
• [N/A] I made sure the code compiles on my machine
• I made sure there are no unnecessary changes in the code*
• I made sure the title of the PR reflects the core meaning of the issue you are solving*
• I made sure the commit message(s) contain a description and answer the question "Why do those changes fix that particular issue?" or "Why are those changes really necessary as improvements?"*

* indicates required

[Be-ing]

 ld: warning: passed two min versions (10.12, 10.12) for platform macOS. Using 10.12.
duplicate symbol 'GetTypesFromExtension(wxString, wxArrayString&)' in:
    src/CMakeFiles/Tenacity.dir/widgets/FileDialog/mac/FileDialogPrivate.mm.o
    ../wxwidgets-install/lib/libwx_osx_cocoau_core-3.1.a(filedlg.mm.o)
duplicate symbol 'GetTypesFromFilter(wxString const&, wxArrayString&, wxArrayString&)' in:
    src/CMakeFiles/Tenacity.dir/widgets/FileDialog/mac/FileDialogPrivate.mm.o
    ../wxwidgets-install/lib/libwx_osx_cocoau_core-3.1.a(filedlg.mm.o)
ld: 2 duplicate symbols for architecture x86_64

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