Update syntax for loading sample datasets in tutorials

This PR is a follow-up of #1685 and updates the syntax for loading sample datasets in all corresponding tutorials.

examples/tutorials/basics/plot.py

@@ -14,10 +14,10 @@
 
 ###############################################################################
 # For example, let's load the sample dataset of tsunami generating earthquakes
-# around Japan (:func:`pygmt.datasets.load_japan_quakes`). The data is loaded
+# around Japan (:func:`pygmt.datasets.load_sample_data(name="japan_quakes")`). The data is loaded
 # as a :class:`pandas.DataFrame`.
 
-data = pygmt.datasets.load_japan_quakes()
+data = pygmt.datasets.load_sample_data(name="japan_quakes")
 
 # Set the region for the plot to be slightly larger than the data bounds.
 region = [