Suppress downgrade error in SharedFx bundle (#43122)

Co-authored-by: William Godbe <wigodbe@microsoft.com>

src/Installers/Windows/SharedFrameworkBundle/Bundle.wxs

@@ -4,6 +4,7 @@
         <BootstrapperApplicationRef Id="WixStandardBootstrapperApplication.HyperlinkLicense">
             <bal:WixStandardBootstrapperApplication LicenseUrl="https://go.microsoft.com/fwlink/?LinkId=329770"
                                                     LogoFile="DotNetLogo.bmp"
+                                                    SuppressDowngradeFailure="yes"
                                                     SuppressOptionsUI="yes"
                                                     ThemeFile="thm.xml"
                                                     LocalizationFile="thm.wxl"/>