C++: Add change-note.

MathiasVP · MathiasVP · commit 7d26aca79335 · 2021-05-12T16:34:23.000+02:00
diff --git a/cpp/change-notes/2021-12-05-uncontrolled-arithmetic.md b/cpp/change-notes/2021-12-05-uncontrolled-arithmetic.md
@@ -0,0 +1,2 @@
+lgtm,codescanning
+* The query "Uncontrolled arithmetic" (`cpp/uncontrolled-arithmetic`) has been improved to produce fewer false positives.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+lgtm,codescanning`
	`2`	+* The query "Uncontrolled arithmetic" (`cpp/uncontrolled-arithmetic`) has been improved to produce fewer false positives.