Update examples/tutorial_examples/plot_001_afq_api.py

Co-authored-by: Ariel Rokem <arokem@gmail.com>

examples/tutorial_examples/plot_001_afq_api.py

@@ -56,7 +56,7 @@
 # We make create a `tracking_params` variable, which we will pass to the
 # GroupAFQ object which specifies that we want 25,000 seeds randomly
 # distributed in the white matter. We also set num_chunks to True,
-# which will use ray to parallelize the tracking across each core.
+# which will use ray to parallelize the tracking across all cores.
 # This can be removed to process in serial.
 #
 # We only do this to make this example faster and consume less space.