build: bump StateSelection compat

Author: AayushSabharwal

Project.toml

@@ -113,7 +113,7 @@ Serialization = "1"
 Setfield = "0.7, 0.8, 1"
 SimpleNonlinearSolve = "0.1.0, 1, 2"
 SparseArrays = "1"
-StateSelection = "1.5"
+StateSelection = "1.9.1"
 StaticArrays = "1.9.14"
 StochasticDelayDiffEq = "1.11"
 StochasticDiffEq = "6.82.0"