Fix typo

Author: khoih-prog

README.md

@@ -6,7 +6,7 @@
 [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
 [![GitHub issues](https://img.shields.io/github/issues/khoih-prog/FS_Nano33BLE.svg)](http://github.com/khoih-prog/FS_Nano33BLE/issues)
 
-<a href="https://www.buymeacoffee.com/khoihprog6" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" style="height: 60px !important;width: 217px !important;" ></a>
+<a href="https://www.buymeacoffee.com/khoihprog6" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" style="height: 50px !important;width: 181px !important;" ></a>
 
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@@ -69,7 +69,7 @@ The filesystem access uses normal [POSIX APIs](https://www.tutorialspoint.com/c_
 ## Prerequisites
 
 1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [![GitHub release](https://img.shields.io/github/release/arduino/Arduino.svg)](https://github.com/arduino/Arduino/releases/latest)
-2. [`Arduino mbed_nano core 2.6.1+`](https://github.com/arduino/ArduinoCore-mbed) for Arduino (Use Arduino Board Manager) MBED nRF52840-based boards such as **Nano_33_BLE, Nano_33_BLE_Sense**. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-mbed.svg)](https://github.com/arduino/ArduinoCore-mbed/releases/latest)
+2. [`Arduino mbed_nano core 2.7.2+`](https://github.com/arduino/ArduinoCore-mbed) for Arduino (Use Arduino Board Manager) MBED nRF52840-based boards such as **Nano_33_BLE, Nano_33_BLE_Sense**. [![GitHub release](https://img.shields.io/github/release/arduino/ArduinoCore-mbed.svg)](https://github.com/arduino/ArduinoCore-mbed/releases/latest)
 
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library.json

@@ -12,7 +12,7 @@
   "repository":
   {
     "type": "git",
-    "url": "//https://github.com/khoih-prog/FS_Nano33BLE"
+    "url": "https://github.com/khoih-prog/FS_Nano33BLE"
   },
   "homepage": "https://github.com/khoih-prog/FS_Nano33BLE",
   "export": {