Corrects Bios privilges

The privileges were converted to a string by mistake in the previous
commit (see below).
https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/44691

Change-Id: Iaf1d8ec9d4a041703d3f5796e5de8e582d7010d0
Signed-off-by: John Edward Broadbent <jebr@google.com>
diff --git a/redfish-core/lib/bios.hpp b/redfish-core/lib/bios.hpp
index f4e2dc0..c2fb284 100644
--- a/redfish-core/lib/bios.hpp
+++ b/redfish-core/lib/bios.hpp
@@ -58,7 +58,7 @@
 inline void requestRoutesBiosReset(App& app)
 {
     BMCWEB_ROUTE(app, "/redfish/v1/Systems/system/Bios/Actions/Bios.ResetBios/")
-        .privileges({{"redfish::privileges::postBios"}})
+        .privileges(redfish::privileges::postBios)
         .methods(boost::beast::http::verb::post)(handleBiosResetPost);
 }