Fix moves/forward

Clang has new checks for std::move/std::forward correctness, which
catches quite a few "wrong" things where we were making copies of
callback handlers.

Unfortunately, the lambda syntax of

callback{std::forward<Callback>(callback)}

in a capture confuses it, so change usages to
callback = std::forward<Callback>(callback)

to be consistent.

Tested: Redfish service validator passes.

Change-Id: I7a111ec00cf78ecb7d5f5b102c786c1c14d74384
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/http/logging.hpp b/http/logging.hpp
index 0ed4777..49a9cba 100644
--- a/http/logging.hpp
+++ b/http/logging.hpp
@@ -182,7 +182,7 @@
 }
 
 template <LogLevel level>
-inline void vlog(const FormatString& format, std::format_args&& args)
+inline void vlog(const FormatString& format, const std::format_args& args)
 {
     if constexpr (bmcwebCurrentLoggingLevel < level)
     {