Update CHANGELOG.md

Generalization of initial condition specs leads to a change in the API,
but it is no new addition to the program.

[skip ci]

CHANGELOG.md

@@ -26,7 +26,6 @@
 * Infrastructure for the input of Miller scaling fields. !110
 * Add logging framework 'spdlog' as submodule !106
 * Support input of boundary segmentations !119
-* Generalized initial condition specification in config file !129
 
 ### Changed
 * `Simulation` is renamed `RichardsSimulation` and moved to 
@@ -120,6 +119,7 @@
 
 * Use logging framework 'spdlog' for all terminal output !106
 * DORiE now writes vertex data by default. #129
+* Generalized initial condition specification in config file !129
 
 ### Fixed
 * Solver in `RichardsSimulation` was using the wrong time variable.