IdentifierHiding - Add change note

Author: lcartey

change_notes/2024-12-08-identifier-hiding.md

@@ -0,0 +1,4 @@
+ - `A2-10-1` - `IdentifierHiding.ql`:
+   - Improved evaluation performance.
+   - Addressed false negatives where nested loops used the same variable name.
+   - Exclude cases where a variable declared in a lambda expression shadowed a globa or namespace variable that did not appear in the same translation unit.