Fix/tutorial test (e2nIEE#2127)

* fix matplotlib runtimeerror due to midssing axes in colorbar
(former deprecation warning)

* updated changelog

CHANGELOG.rst

@@ -15,18 +15,19 @@ Change Log
 - [FIXED] some fixes and small updates at cim2pp
 - [CHANGED] add numba in the dependencies for Python 3.11 for GitHub test and release actions; revise numba version checks
 - [ADDED] improved documentation for short-circuit calculation (description of the function and the element results)
-- [FIXED] fixed bug in :code:`pp.select_subnet` when using tap dependent impedance
+- [FIXED] bug in :code:`pp.select_subnet` when using tap dependent impedance
 - [ADDED] extensive unit tests for cim2pp converter (element parameter and load flow results)
-- [FIXED] fixed bug in :code:`cim2pp.build_pp_net` when setting default values for converted xwards
-- [FIXED] fixed bug in :code:`cim2pp.build_pp_net` when controller for gen is at TopologicalNode instead of ConnectivityNode
+- [FIXED] bug in :code:`cim2pp.build_pp_net` when setting default values for converted xwards
+- [FIXED] bug in :code:`cim2pp.build_pp_net` when controller for gen is at TopologicalNode instead of ConnectivityNode
 - [CHANGED] adjust default iterations for runpp_3ph
 - [CHANGED] always convert RATE_A to ppc in build_branch (not only when mode == 'opf' as before)
 - [FIXED] in converter from PowerFactory, collect all buses (even not relevant for the calculation) for connectivity issues
-- [FIXED] fixed bug in coords conversion in cim2pp, small fixes
+- [FIXED] bug in coords conversion in cim2pp, small fixes
 - [CHANGED] cim2pp: added support for multi diagram usage for DL profiles
 - [FIXED] error handling in :code:`plotly/mapbox_plot.py` not raising :code`ImportError` if :code:`geopy`  or :code:`pyproj` are missing
 - [FIXED] powerfactory2pandapower-converter error if a line has two identical coordinates
 - [ADDED] logger messages about the probabilistic load flow calculation (simultaneities) in the powerfactory2pandapower-converter for low voltage loads
+- [ADDED] matplotlib v3.8.0 support (fixed :code:`plotting_colormaps.ipynb`)
 
 
 [2.13.1] - 2023-05-12