update readme to show clear example of use_shared_strings for Numbers
update readme to show clear example of use_shared_strings for Numbers

Debiancc/axlsx,bradstewart/axlsx,sh-ft/axlsx,woto/axlsx,sr-education/axlsx,VueOps/axlsx,clarkcutler/axlsx,legitscript/axlsx,randym/axlsx,romuloceccon/axlsx,nilbus/axlsx,pedrogarrett/axlsx,mromulus/axlsx,kappiah/axlsx,alexanderfrankel/axlsx,raghavendra-prithvi/axlsx