Added splanning to related projects

index.markdown

@@ -300,7 +300,7 @@ SPARROWS' performance on a handful of these scenarios is demonstrated below.
 <div markdown="1" class="justify">
 
 # [Related Projects](#related-projects)
-  
+* [Let's Make a Splan: Risk-Aware Trajectory Optimization in a Normalized Gaussian Splat](https://roahmlab.github.io/splanning/)
 * [Autonomous Robust Manipulation via Optimization with Uncertainty-aware Reachability](https://roahmlab.github.io/armour/)
 * [Reachability-based Trajectory Design with Neural Implicit Safety Constraints](https://roahmlab.github.io/RDF/)
 * [Reachability-based Trajectory Design via Exact Formulation of Implicit Neural Signed Distance Functions](https://roahmlab.github.io/redefined/)