.gitignore: add Visual Studio CMakeSetting.json file

PhilipOakley · Git for Windows Build Agent · commit 53ab85bccc9d · 2022-06-03T22:36:23.000Z
The CMakeSettings.json file is tool generated. Developers may track it
should they provide additional settings.

Signed-off-by: Philip Oakley &lt;philipoakley@iee.email&gt;
diff --git a/.gitignore b/.gitignore
@@ -246,3 +246,4 @@ Release/
 /git.VC.db
 *.dSYM
 /contrib/buildsystems/out
+CMakeSettings.json
