update transition matrices notebook reference (#1508)

Signed-off-by: Emmanuel Ferdman <[email protected]>

examples/Journeys/Journey-Policymaker.ipynb

@@ -325,7 +325,7 @@
    "metadata": {},
    "source": [
     "### 2.3 Simulation\n",
-    "After we solved the model backwards, we can simulate agents forward using Monte Carlo or [Transition Matrices](https://github.com/econ-ark/HARK/tree/master/examples/ConsIndShockModel/IndShockConsumerType_Transition_Matrix_Example.ipynb). These results can be used for in-model regressions or plotting distributions of assets or consumption."
+    "After we solved the model backwards, we can simulate agents forward using Monte Carlo or [Transition Matrices](https://github.com/econ-ark/HARK/tree/master/examples/ConsNewKeynesianModel/Transition_Matrix_Example.ipynb). These results can be used for in-model regressions or plotting distributions of assets or consumption."
    ]
   },
   {