Update cpp/ql/lib/change-notes/2024-06-20-extensible-allocation-deallocation.md

Co-authored-by: Geoffrey White <40627776+geoffw0@users.noreply.github.com>

Author: MathiasVP

cpp/ql/lib/change-notes/2024-06-20-extensible-allocation-deallocation.md

@@ -1,4 +1,4 @@
 ---
 category: feature
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-* It is now possible to extend the classes `AllocationFunction` and `DeallocationFunction` via data extensions. Extensions of these classes should be added to `lib/ext/allocation` and `lib/ext/deallocation` respectively.
+* It is now possible to extend the classes `AllocationFunction` and `DeallocationFunction` via data extensions. Extensions of these classes should be added to the `lib/ext/allocation` and `lib/ext/deallocation` directories respectively.