docs: set NumPy printoptions

docs/content/executable/output-insert.md

@@ -81,6 +81,8 @@ to focus on the glueing part.
 
 # Simulate some data and bootstrap the mean of the data
 import numpy as np
+np.set_printoptions(legacy="1.25")
+
 import pandas as pd
 import matplotlib.pyplot as plt