C++: Add change note.

MathiasVP · MathiasVP · commit f1a7b1a853fc · 2023-04-13T17:35:28.000+01:00
diff --git a/cpp/ql/src/change-notes/2023-04-13-redundant-null-check.md b/cpp/ql/src/change-notes/2023-04-13-redundant-null-check.md
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+---
+category: newQuery
+---
+* The query `cpp/redundant-null-check-simple` has been promoted to Code Scanning. The query finds cases where a pointer is compared to null after it has already been dereferenced. Such comparisons likely indicate a bug at the place where the pointer is dereferenced, or where the pointer is compared to null.

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 +---
 +category: newQuery
 +---
 +* The query `cpp/redundant-null-check-simple` has been promoted to Code Scanning. The query finds cases where a pointer is compared to null after it has already been dereferenced. Such comparisons likely indicate a bug at the place where the pointer is dereferenced, or where the pointer is compared to null.