Add submission # 6969

#6969

Author: ArduinoBot

registry.txt

@@ -8414,3 +8414,4 @@ https://github.com/Harmony-Maker-Club/AIP1640_LED_Matrix.git|Contributed|AIP1640
 https://github.com/MISTERNEGATIVE21/QuectelEC200U_CN.git|Contributed|QuectelEC200U_CN
 https://github.com/WeSpeakEnglish/ANTIRTOS_MODERN.git|Contributed|ANTIRTOS_MODERN
 https://github.com/hidori/MicroSerial.git|Contributed|MicroSerial
+https://github.com/gustavofisica/PulseHeartLab.git|Contributed|PulseHeartLab