Swift: Split for-each change note into two lines

Author: rdmarsh2

swift/ql/lib/change-notes/2023-09-14-for-in-data-flow.md

@@ -2,4 +2,5 @@
 category: minorAnalysis
 ---
 
-* The data flow library now supports flow to the loop variable of for-in loops. Additionally, the methods `getIteratorVar` and `getNextCall` have been added to the `ForEachStmt` class.
+* The data flow library now supports flow to the loop variable of for-in loops.
+* The methods `getIteratorVar` and `getNextCall` have been added to the `ForEachStmt` class.