Add change note.

lcartey · lcartey · commit 8287ff20a882 · 2023-07-30T23:24:34.000+01:00
diff --git a/change_notes/2023-07-30-update-to-2.11.6.md b/change_notes/2023-07-30-update-to-2.11.6.md
@@ -0,0 +1 @@
+ - Updated the supported CodeQL version to `2.11.6`.

Original file line number	Diff line number	Diff line change
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	`1`	+ - Updated the supported CodeQL version to `2.11.6`.