CPP: Change note.

Author: geoffw0

change-notes/1.21/analysis-cpp.md

@@ -11,6 +11,7 @@
 
 | **Query**                  | **Expected impact**    | **Change**                                                       |
 |----------------------------|------------------------|------------------------------------------------------------------|
+| Commented-out code (`cpp/commented-out-code`) | More correct results | Commented out preprocessor code is now detected by this query. |
 | Dead code due to goto or break statement (`cpp/dead-code-goto`) | Fewer false positive results | Functions containing preprocessor logic are now excluded from this analysis. |
 | Mismatching new/free or malloc/delete (`cpp/new-free-mismatch`) | Fewer false positive results | Fixed an issue where functions were being identified as allocation functions inappropriately.  Also affects `cpp/new-array-delete-mismatch` and `cpp/new-delete-array-mismatch`. |
 | Overflow in uncontrolled allocation size (`cpp/uncontrolled-allocation-size`) | More correct results | This query has been reworked so that it can find a wider variety of results. |