v1.2.0 to match new ESP8266 core v3.0.0

### Releases v1.2.0

1. Update to match new ESP8266 core v3.0.0

Author: khoih-prog

README.md

@@ -130,7 +130,7 @@ This [**ESP8266_ISR_Servo** library](https://github.com/khoih-prog/ESP8266_ISR_S
 
 1. [`Arduino IDE 1.8.13+`](https://www.arduino.cc/en/Main/Software)
 2. [`ESP8266 Core 3.0.0+`](https://github.com/esp8266/Arduino) for ESP8266-based boards. [![Latest release](https://img.shields.io/github/release/esp8266/Arduino.svg)](https://github.com/esp8266/Arduino/releases/latest/). To use ESP8266 core 2.7.1+ for LittleFS. 
-3. [`Blynk_WM library v1.5.0+`](https://github.com/khoih-prog/Blynk_WM) to use with some examples. To install. check [![arduino-library-badge](https://www.ardu-badge.com/badge/Blynk_WM.svg?)](https://www.ardu-badge.com/Blynk_WM).
+3. [`Blynk_WM library v1.5.0+`](https://github.com/khoih-prog/Blynk_WM) to use with some examples. To install. check [![arduino-library-badge](https://www.ardu-badge.com/badge/Blynk_WiFiManager.svg?)](https://www.ardu-badge.com/Blynk_WiFiManager).
 4. [`ESP_DoubleResetDetector library v1.1.1+`](https://github.com/khoih-prog/ESP_DoubleResetDetector) to use with some examples. To install. check [![arduino-library-badge](https://www.ardu-badge.com/badge/ESP_DoubleResetDetector.svg?)](https://www.ardu-badge.com/ESP_DoubleResetDetector).
 
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