Update repositories.txt (#6034)

Author: Khuuxuanngoc

repositories.txt

@@ -3,6 +3,7 @@ https://github.com/csobirka/SevenSegment
 https://github.com/Zeppelin500/MBusCom
 https://github.com/MYCAMEL222/AbleTP
 https://github.com/snowhalationmkii/TTP229_BS81X_Serial
+https://github.com/Khuuxuanngoc/Makerlabvn_I2C_Line_Follower_Sensor
 https://github.com/oskozach/InputSwitch
 https://github.com/oskozach/MsTime
 https://github.com/robinz-labs/digishow-rioc