STEP: Normalize path to kicad-cli

Keeping the path relative messes up the logic that loads the DSO

Fixes https://gitlab.com/kicad/code/kicad/-/issues/12728

pcbnew/dialogs/dialog_export_step.cpp

@@ -378,6 +378,7 @@ void DIALOG_EXPORT_STEP::onExportButton( wxCommandEvent& aEvent )
 #endif
 
     appK2S.SetName( wxT( "kicad-cli" ) );
+    appK2S.Normalize( wxPATH_NORM_ALL );
 
     wxString cmdK2S = wxT( "\"" );
     cmdK2S.Append( appK2S.GetFullPath() );