C#: Add change note

hvitved · hvitved · commit 591f90f98ec3 · 2020-12-21T10:26:49.000+01:00
diff --git a/csharp/change-notes/2020-12-21-merge-format-queries.md b/csharp/change-notes/2020-12-21-merge-format-queries.md
@@ -0,0 +1,2 @@
+lgtm,codescanning
+* The queries `FormatInvalid.ql`, `FormatMissingArgument.ql`, and `FormatUnusedArgument.ql` have been merged into a single `FormatInvalid.ql` query.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+lgtm,codescanning`
	`2`	+* The queries `FormatInvalid.ql`, `FormatMissingArgument.ql`, and `FormatUnusedArgument.ql` have been merged into a single `FormatInvalid.ql` query.