Update 'README.md'

README.md

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-A repo for the code of the Line Following robot we are making for Robotex 2022
+A repo for the code of the Line Following robot we made for Robotex 2022.Now updated and refined for the 2023 competition.
 
-Based on this project:https://create.arduino.cc/projecthub/anova9347/line-follower-robot-with-pid-controller-cdedbd
+Based on this project:https://create.arduino.cc/projecthub/anova9347/line-follower-robot-with-pid-controller-cdedbd