Update changelog

docs/changes/53.maintenance.rst

@@ -1,10 +1,11 @@
 - Complete rewrite of dataset creation routine ``pyvisgen.simulation.data_set.SimulateDataSet``
   - Accessible using a classmethod to load a config file
-  - Add optional multiprocessing support
+  - Add optional multithreading support
   - Draw and fully test parameters before simulation loop. Previously this was done in the loop and tests were only performed for two time steps
   - Support for polarization
 - Add new default config file for new dataset creation routine
 - Update CLI tool for dataset creation routine
 - Allow passing HDF5 key in ``pyvisgen.utils.data.open_bundles``
 - Restructure ``pyvisgen.gridding`` module by adding a ``utils`` submodule that contains all utility functions that previously were in the ``gridder`` submodule
   - Also fix parts of the utility functions
+- Update and fix tests