Improve the language on some strings (#13553)

Co-authored-by: Ian Bassi <ian.bassi@outlook.com>

src/slic3r/GUI/GUI_App.cpp

@@ -2843,7 +2843,7 @@ bool GUI_App::on_init_inner()
                 wxString tips = wxString::Format(_L("Click to download new version in default browser: %s"), version_str);
                 DownloadDialog dialog(this->mainframe,
                     tips,
-                    _L("The Orca Slicer needs an upgrade"),
+                    _L("OrcaSlicer needs an update"),
                     false,
                     wxCENTER | wxICON_INFORMATION);
                 dialog.SetExtendedMessage(description_text);