publications: Add Sparsity/BabyAI Publication

[smspillaz]

Description

Adds Composition Generalization in Grounded Language Learning via Induced Model Sparsity. We use BabyAI for our experiments.

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

[smspillaz]

No worries. Thanks for continuing to maintain minigrid :-)