C#: Add change note

hvitved · hvitved · commit 7a132149a27b · 2020-12-17T15:39:01.000+01:00
diff --git a/csharp/change-notes/2020-12-17-format-method-empty-overload.md b/csharp/change-notes/2020-12-17-format-method-empty-overload.md
@@ -0,0 +1,2 @@
+lgtm,codescanning
+* For string formatting methods, such as `System.Console.WriteLine(string format, params object[] arg)`, we now also recognize overloads without insertion parameters as string formatting methods. For example, `System.Console.WriteLine(string value)` is now also a member of the class `FormatMethod` in `frameworks/Format.qll`.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+lgtm,codescanning`
	`2`	+* For string formatting methods, such as `System.Console.WriteLine(string format, params object[] arg)`, we now also recognize overloads without insertion parameters as string formatting methods. For example, `System.Console.WriteLine(string value)` is now also a member of the class `FormatMethod` in `frameworks/Format.qll`.