Rename SU and SD parameters in the docs

docs/src/concept_reference/max_startup_ramp.md → docs/src/concept_reference/shut_down_limit.md

@@ -1,3 +1,3 @@
-The definition of the `max_startup_ramp` parameter will trigger the creation of the [Constraint on upward start up ramp_up](@ref constraint_max_start_up_ramp). It sets an upper bound on the [unit\_flow](@ref) variable for the timestep right after a startup.
+The definition of the `shut_down_limit` parameter sets an upper bound on the [unit\_flow](@ref) variable for the timestep right before a shutdown.
 
-It can be defined for [unit__to_node](@ref) or [unit__from_node](@ref) relationships, as well as their counterparts for node groups. It will then impose restrictions on the `unit_flow` variables that indicate flows between the two members of the relationship for which the parameter is defined. The parameter is given as a fraction of the [unit\_capacity](@ref) parameter. When the parameter is not included, the aforementioned constraint will not be created, which is equivalent to choosing a value of 1.
+It can be defined for [unit__to_node](@ref) or [unit__from_node](@ref) relationships, as well as their counterparts for node groups. It will then impose restrictions on the `unit_flow` variables that indicate flows between the two members of the relationship for which the parameter is defined. The parameter is given as a fraction of the [unit\_capacity](@ref) parameter. When the parameter is not specified the limit will not be imposed, which is equivalent to choosing a value of 1.

docs/src/concept_reference/max_shutdown_ramp.md → docs/src/concept_reference/start_up_limit.md

@@ -1,3 +1,3 @@
-The definition of the `max_shutdown_ramp` parameter will trigger the creation of the [constraint on maximum shutdown ramp](@ref constraint_max_shut_down_ramp). It sets an upper bound on the [unit\_flow](@ref) variable for the timestep right before a shutdown.
+The definition of the `start_up_limit` parameter sets an upper bound on the [unit\_flow](@ref) variable for the timestep right after a startup.
 
-It can be defined for [unit__to_node](@ref) or [unit__from_node](@ref) relationships, as well as their counterparts for node groups. It will then impose restrictions on the `unit_flow` variables that indicate flows between the two members of the relationship for which the parameter is defined. The parameter is given as a fraction of the [unit\_capacity](@ref) parameter. When the parameter is not included, the aforementioned constraint will not be created, which is equivalent to choosing a value of 1.
+It can be defined for [unit__to_node](@ref) or [unit__from_node](@ref) relationships, as well as their counterparts for node groups. It will then impose restrictions on the `unit_flow` variables that indicate flows between the two members of the relationship for which the parameter is defined. The parameter is given as a fraction of the [unit\_capacity](@ref) parameter. When the parameter is not specified the limit will not be imposed, which is equivalent to choosing a value of 1.