windows installer support 32bit x86 (#1533)

Co-authored-by: rejbasket <rejbasket@users.noreply.github.com>

installer_scripts/template.iss

@@ -22,7 +22,7 @@ AppUpdatesURL={#URL}
 DefaultDirName={userappdata}\inkscape\extensions\
 DefaultGroupName={#PROGRAMNAME}
 ; Remove the following line to run in administrative install mode (install for all users.)
-ArchitecturesAllowed=x64
+ArchitecturesAllowed=x64 x86
 PrivilegesRequired=lowest
 OutputBaseFilename=inkstitch
 OutputDir=.