Merge pull request #7 from xianglin1998/master

add a link to view updated note in readme

README.md

@@ -5,6 +5,7 @@
 [img_cml]: /githubsrc/chameleonx173.png
 [img_532]: /githubsrc/PN532x173.png
 [link_download_google]: https://play.google.com/store/apps/details?id=com.rfidresearchgroup.rfidtools&hl=en_US
+[link_updated_note]: https://github.com/xianglin1998/RFIDtools/blob/master/update_note.txt
 
 <p align="center" background="#000000">
     <img align="center" src="/githubsrc/rfidx100.png" alt="RFID Tools" width="100" height="100">
@@ -35,6 +36,10 @@ The app support the following devices
 - [Download RFID Tools apk here][link_download_google]
 -->
 
+## Updated note for app.
+
+- [View note][link_updated_note]
+
 ## Proxmark3 firmware
 
 To use your Proxmark3 RDV4 with blueshark via bluetooth with this app there is an extra step.