Update docs/src/catalyst_applications/jump_simulation_performance.md

Co-authored-by: Sam Isaacson <[email protected]>

Author: TorkelE

docs/src/catalyst_applications/jump_simulation_performance.md

@@ -113,7 +113,7 @@ nothing # hide
 ```
 Here (as throughout most of Catalyst's documentation) we have used the `Direct()` SSA solver (which corresponds to Gillespie's original direct method [^2][^3]). This method was originally published in 1976, and since then, many additional methods for simulating stochastic chemical kinetics models have been developed. 
 
-Gillespie's direct method will, after a jump has been performed, recompute the rates of *all* possible jumps in the system. This is typically not required. E.g. consider the following system:
+Gillespie's direct method will, after a jump has been performed, recompute the propensities of *all* possible jumps in the system (i.e. of all reactions). This is typically not required. E.g. consider the following system:
 ```@example jump_simulation_performance_2
 @reaction_network begin
     k1, X1 --> X2