clang-format-11: reformat

The .clang-format file here is an old version of the common one.
Upgrade to the latest and reformat.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ic87853e6004d2d5ad6645a3ece8c0c87ccc96efd
diff --git a/snmp_serialize.hpp b/snmp_serialize.hpp
index 2608866..8f1400e 100644
--- a/snmp_serialize.hpp
+++ b/snmp_serialize.hpp
@@ -1,8 +1,9 @@
 #pragma once
 
-#include <experimental/filesystem>
 #include "snmp_client.hpp"
 
+#include <experimental/filesystem>
+
 namespace phosphor
 {
 namespace network