Update README.md

Author: Init-io

README.md

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 Yo, welcome to **JavaMQTT** – a minimalist MQTT wrapper for Java and Android devs who just want to send data, not write dissertations on `IMqttToken`. No AndroidX, no `MqttAndroidClient` drama. Just vibes and messages flying over TCP/SSL.
 
-![banner]([https://templates.peakboard.com/Intralogistics-Order-Parts-with-MQTT/img/peakboard-mqtt-dashboards.gif])
+![banner](https://templates.peakboard.com/Intralogistics-Order-Parts-with-MQTT/img/peakboard-mqtt-dashboards.gif)
 
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