Swift: Added change note for the new barriers.

swift/ql/src/change-notes/2023-09-19-numeric-barriers.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Adder barriers for numeric type values to the injection-like queries, to reduce false positive results where the user input that can be injected is constrainted to a numerical value. The queries updated by this change are: "Predicate built from user-controlled sources" (`swift/predicate-injection`), "Database query built from user-controlled sources" (`swift/sql-injection`), "Uncontrolled format string" (`swift/uncontrolled-format-string`) and "JavaScript Injection" (`swift/unsafe-js-eval`).