Update README.md

README.md

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 | **Meta-training distribution** | ImageNet classification, 3-layer MLP, width ∈ {128, 512, 1024}            |
 | **Number of meta-training steps** | 5000                                                                |
 | **Target inner problem length**   | 1000 iterations                                                     |
-| **Gradient estimator**       | PES (Persistent Evolution Strategies)                                    |
+| **Gradient estimator**       | Persistent Evolution Strategies                                   |
 | **Truncation length**        | 50                                                                        |
-| **Architecture**             | small_fc_lopt [(Metz et al., 2022a)](https://arxiv.org/abs/2203.11860)                                        |
+| **Architecture**             | small_fc_lopt                                        |
 | **Optimizer Input size**           | 39                                                           |
 | **Optimizer Hidden size**           | 32                                                           |
 | **Optimizer Output size**           | 2                                                           |