Update CHANGELOG.rst

Author: wpreimes

CHANGELOG.rst

@@ -6,10 +6,13 @@ Unreleased changes in master
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 -
 
+Version 0.15.2, 2023-06-14
+==========================
+- Add kwarg to `time_series.anomaly.calc_climatology` to compute the standard deviation of the climatology (e.g. for anomaly z-scores)
 
-Version 0.15.1, 2023-06-14
+Version 0.15.1, 2023-03-29
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-- add kwarg to `time_series.anomaly.calc_climatology` to compute the standard deviation of the climatology.
+- Adding scikit-learn as installation dependency.
 
 Version 0.15.0, 2023-03-28
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