JS: Edit change note

Author: asgerf

javascript/ql/src/change-notes/2022-10-04-json-stringify-improvement.md

@@ -1,4 +1,4 @@
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 category: minorAnalysis
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-* Improved taint tracking behavior when the `JSON.stringify` method called. Previously, `JsonStringifyTaintStep` detects only if the source is equal to an argument. Now, it can detect the case that the argument is object and source is located in its property.
+* Improved taint tracking through `JSON.stringify` in cases where a tainted value is stored somewhere in the input object.