Update changelog (#493)

* Update changelog
As internal variable names with non-ASCII characters have been replaced by ASCII equivalents, the TOML keys `kv₀`, `θᵣ` and `θₛ` are not supported anymore. This has been added to changelog.

* Remove double quotes TOML keys in docs

docs/src/changelog.md

@@ -102,7 +102,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - For improved code readability it is now discouraged to use non-ASCII characters for the
   names of variables, structs, functions and macros. Using the non-ASCII character for
   built-in operators is still allowed. This change in naming convention is now in effect and
-  all invalid uses of non-ASCII characters have been replaced by ASCII equivalents.
+  all invalid uses of non-ASCII characters have been replaced by ASCII equivalents. This
+  change also impacts the TOML keys `kv₀`, `θᵣ` and `θₛ`. These keys have been replaced with
+  the ASCII versions `kv_0`, `theta_r` and `theta_s` in v0.4.0 and the old keys are not
+  supported anymore.
 - Docs: 1) improved description of different model configurations in model-setup.md, also in
   relation to hydromt\_wflow in docs, 2) citing info related to wflow\_sbm publication in
   Geosci. Model Dev. (from in review to published).

docs/src/user_guide/step2_settings_file.md

@@ -152,7 +152,7 @@ e_r = "EoverR"
 infiltcappath = "InfiltCapPath"
 infiltcapsoil = "InfiltCapSoil"
 kext = "Kext"
-"kv_0" = "KsatVer"
+kv_0 = "KsatVer"
 leaf_area_index = "LAI"             # Cyclic variable
 m = "M"
 maxleakage = "MaxLeakage"
@@ -172,8 +172,8 @@ ttm = "TTM"
 w_soil = "wflow_soil"
 water_holding_capacity = "WHC"
 waterfrac = "WaterFrac"
-"theta_r" = "thetaR"
-"theta_s" = "thetaS"
+theta_r = "thetaR"
+theta_s = "thetaS"
 
 [input.lateral.river]
 length = "wflow_riverlength"