Update docs/tutorial.rst

Co-authored-by: Peter Ralph <[email protected]>

Author: gregorgorjanc

docs/tutorial.rst

@@ -530,7 +530,7 @@ uniform recombination rate set to the average recombination rate for that chromo
    # model mutation rate: 2.35e-08
 
 The Gutenkunst OOA model was inferred using a mutation rate much larger than the
-default mutation rate for human species in the ``stdpopsim`` catalog. As such,
+default mutation rate for humans in the ``stdpopsim`` catalog. As such,
 simulating using this model and default rate will result in levels of diversity
 substantially lower than expected for the human population data that this model
 was inferred from. To match observed diversity in humans, we should instead use