C++: Add change-note.

MathiasVP · MathiasVP · commit b2e9fe79a738 · 2021-06-15T10:01:45.000+02:00
diff --git a/cpp/change-notes/2021-06-15-path-sensitive-stack-reachability.md b/cpp/change-notes/2021-06-15-path-sensitive-stack-reachability.md
@@ -0,0 +1,4 @@
+lgtm,codescanning
+* The `StackVariableReachability` library now ignores some paths that contain an infeasible combination
+  of conditionals. These improvements primarily affect the queries `cpp/uninitialized-local` and
+  `cpp/use-after-free`.
