Update CHANGELOG text.

CHANGELOG.md

@@ -12,8 +12,8 @@ that users understand how the changes affect the new version.
 version 3.2.0-develop
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 + Picard: Make a number of outputs in `CollectMultipleMetrics` optional. BamMetrics
-  will fail if `CollectAlignmentSummaryMetrics` & `MeanQualityByCycle` in this
-  task are not optional.
+  will fail if `CollectAlignmentSummaryMetrics` & `MeanQualityByCycle` are set
+  to false and their outputs are not optional.
 + The struct `BowtieIndex` was removed, as it has become obsolete.
 + The task `ReorderGlobbedScatters` was removed, as it has become obsolete.
 + Adjusted the memory settings of many tools, especially java tools.