fix typo

Author: drbenvincent

docs/source/notebooks/its_pymc.ipynb

@@ -299,7 +299,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "As well as the model coefficients, we might be interested in the estimated causal impact of the intervention. The post intervention causal impact estimates are contained in the `post_impact` attribute, which is of type `xarray.DataArray`. We can take a look at what this looks like, and we can see that it consistes of 3 dimensions: `chain`, `draw`, and time (`obs_ind`). The `chain` and `draw` dimensions are used to store the samples from the posterior distribution, while the `obs_ind` dimension corresponds to the time points in the time series."
+    "As well as the model coefficients, we might be interested in the estimated causal impact of the intervention. The post intervention causal impact estimates are contained in the `post_impact` attribute, which is of type `xarray.DataArray`. We can take a look at what this looks like, and we can see that it consists of 3 dimensions: `chain`, `draw`, and time (`obs_ind`). The `chain` and `draw` dimensions are used to store the samples from the posterior distribution, while the `obs_ind` dimension corresponds to the time points in the time series."
    ]
   },
   {