Update README.md

Author: ch-shin

README.md

@@ -56,7 +56,7 @@ Curation of papers is generally based on the recent publication in top AI confer
   - m-way pixel attack can circumvent PCA defense (Tran et al, Neurips 2018). --> Estimate robust covariance matrix (+ robust mean if you want) of representations and whiten the representations with the estimated covariance + quantum entropy outlier score (its name is scary.) --> better. 
 
 ### Benchmark
-- [**Just How Toxic is Data Poisoning? A Unified Benchmark for Backdoor and Data Poisoning Attacks**](https://arxiv.org/pdf/2006.12557.pdf) [[code]](https://github.com/aks2203/poisoning-benchmark) ICML 2021
+- [**Just How Toxic is Data Poisoning? A Unified Benchmark for Backdoor and Data Poisoning Attacks**](https://arxiv.org/pdf/2006.12557.pdf) [[code](https://github.com/aks2203/poisoning-benchmark)] ICML 2021
   - Avi Schwarzschild, Micah Goldblum, Arjun Gupta, John P. Dickerson, Tom Goldstein