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: I0d532aa88d650e9c7664e07abfc8c4fdf0dd3df4
diff --git a/mainapp.cpp b/mainapp.cpp
index c9da030..e08da61 100644
--- a/mainapp.cpp
+++ b/mainapp.cpp
@@ -13,10 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#include <string>
-#include "user_mgr.hpp"
 #include "config.h"
 
+#include "user_mgr.hpp"
+
+#include <string>
+
 // D-Bus root for user manager
 constexpr auto USER_MANAGER_ROOT = "/xyz/openbmc_project/user";