Update README

Replace base64 qrcode by hosted one to fix display issue
on github, npm and yarn websites

Author: vincepare

README.md

@@ -89,4 +89,4 @@ This plugin doesn't work on mobile devices such as smartphones and tablets, beca
 ### Donate
 Donations are welcome :) via [PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=YXDJFGF8GCGLA&item_name=Vincent%20Par%e9%20-%20www.finalclap.com&item_number=iframeTracker%2dgithub&currency_code=EUR&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted), [Flattr](https://flattr.com/submit/auto?user_id=finalclap&url=https://github.com/vincepare/iframeTracker-jquery&title=iframeTracker%20jQuery%20Plugin&language=&tags=github&category=software) or Bitcoin at this address : `3G5uTti2JPAT738uDeQXjrN7tUj2NZjt6M` or by flashing this lovely QR code :
 
-![qrcode for bitcoin address 3G5uTti2JPAT738uDeQXjrN7tUj2NZjt6M](data:image/png;base64,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)
+![qrcode for bitcoin address 3G5uTti2JPAT738uDeQXjrN7tUj2NZjt6M](https://vincepare.github.io/img/qrcode-bitcoin-3G5uTti2JPAT738uDeQXjrN7tUj2NZjt6M.png)