Update EIP-4519: Fix typos in figures 4 and 5

[Hardblock-IMSE-CNM]

trafficstars

Change files to figures 4 and 5

[eth-bot]

A critical and unhandled exception has occurred: Message: not found Data: (there is no data for this error)(cc @alita-moore, @mryalamanchi)

[Hardblock-IMSE-CNM]

Thanks for the update. I suggest the figure file name be consistent across different images. e.g. change Fig5_rev.png to Figure5.png or Figure5_rev.png

I changed the name to Figure5.jpg, thanks for the suggestion.