[inflation_history] FIX: compat with Google Colab (#439)

* [inflation_history] FIX: compat with Google Colab

* hide output to tidy up

Author: mmcky

lectures/inflation_history.md

@@ -20,9 +20,21 @@ Let's start by installing the necessary Python packages.
 The `xlrd` package is used by `pandas` to perform operations on Excel files.
 
 ```{code-cell} ipython3
+:tags: [hide-output]
 !pip install xlrd
 ```
 
+This lecture also requires `pandas >= 2.1.4`
+
+```{code-cell} ipython3
+:tags: [hide-output]
+from packaging.version import Version
+import pandas as pd
+if Version(pd.__version__) < Version('2.1.4'):
+  !pip install pandas==2.1.4
+  reload(pandas)
+```
+
 We can then import the Python modules we will use.
 
 ```{code-cell} ipython3