Fix docs for using an IPU Model

Author: giordano

docs/src/poplar.md

@@ -55,7 +55,7 @@ While this package requires a physical IPU to use all the available features, yo
 The Poplar SDK provides a feature called IPU Model, which is a software emulation of the behaviour of the IPU hardware.
 While the IPU model comes with [some limitations](https://docs.graphcore.ai/projects/poplar-user-guide/en/latest/poplar_programs.html#programming-with-poplar), it can be useful for testing or debugging.
 
-To use the IPU model in `IPUToolkit.jl`, define the device of your IPU program with `Poplar.IPUModelCreateDevice` (which calls [`IPUModel::createDevice`](https://docs.graphcore.ai/projects/poplar-api/en/3.4.0/poplar/profiling/IPUModel.html#_CPPv4NK6poplar8IPUModel12createDeviceE11OptionFlagsbj) under the hood):
+To use the IPU model in `IPUToolkit.jl`, define the device of your IPU program with [`Poplar.get_ipu_model`](@ref):
 ```julia
 device = Poplar.get_ipu_model()
 # Then the rest of the program continues as usual