clang-format: Update to match docs repo

Update the .clang-format file.
Now includes header sorting and updating PointerAlignment.

Change-Id: I5c7690d8d83cdebe26ff3a73b90a2a8c17dd8054
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/item_updater_helper.hpp b/item_updater_helper.hpp
index a2d90b8..0b67642 100644
--- a/item_updater_helper.hpp
+++ b/item_updater_helper.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
-#include <string>
 #include <sdbusplus/bus.hpp>
+#include <string>
 
 namespace phosphor
 {