Update docs/proposals/2598-XGboost-runtime-trainer-v2/README.md

Co-authored-by: Andrey Velichkevich <andrey.velichkevich@gmail.com>
Signed-off-by: Krishna Gupta <2405732@kiit.ac.in>

Author: Krishna-kg732

docs/proposals/2598-XGboost-runtime-trainer-v2/README.md

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-**[Back to Top](#kep-xxxx-xgboost-runtime-for-kubeflow-trainer-v2)**
 
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