Update publications.md (#291)

docs/content/publications.md

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 List of publications & submissions using Minigrid or BabyAI (please open a pull request to add missing entries):
+- [Evolution Strategies for Sparse Reward Gridworld Environments.](https://link.springer.com/chapter/10.1007/978-3-031-22695-3_19) (DSTG, AJCAI 2022)
 - [History Compression via Language Models in Reinforcement Learning.](https://proceedings.mlr.press/v162/paischer22a.html) (Johannes Kepler University Linz, PMLR 2022)
 - [Leveraging Approximate Symbolic Models for Reinforcement Learning via Skill Diversity](https://arxiv.org/abs/2202.02886) (Arizona State University, ICML 2022)
 - [How to Stay Curious while avoiding Noisy TVs using Aleatoric Uncertainty Estimation](https://proceedings.mlr.press/v162/mavor-parker22a.html) (University College London, Boston University, ICML 2022)