fixup! docs: update documentation with new parameter indexing API and semantics

Author: AayushSabharwal

docs/src/api.md

@@ -37,10 +37,10 @@ ParameterObservedFunction
 #### Parameter timeseries
 
 If the index provider contains parameters that change during the course of the simulation
-at discrete intervals, it must implement the following methods to ensure correct
+at discrete time points, it must implement the following methods to ensure correct
 functioning of [`getu`](@ref) and [`getp`](@ref) for value providers that save the parameter
 timeseries. Note that there can be multiple parameter timeseries, in case different parameters
-change at different times.
+may change at different times.
 
 ```@docs
 is_timeseries_parameter

docs/src/complete_sii.md

@@ -315,7 +315,7 @@ setp(integrator, :b)(integrator, 3.0) # functionally the same as above
 
 ## Parameter Timeseries
 
-If a solution object saves modified parameter values (such as through callbacks) during the
+If a solution object includes modified parameter values (such as through callbacks) during the
 simulation, it must implement several additional functions for correct functioning of
 [`getu`](@ref) and [`getp`](@ref). [`ParameterTimeseriesCollection`](@ref) helps in
 implementing parameter timeseries objects. The following mockup gives an example of