Fix doc header

Author: mborland

doc/decimal.adoc

@@ -4,7 +4,6 @@ Distributed under the Boost Software License, Version 1.0.
 https://www.boost.org/LICENSE_1_0.txt
 ////
 
-= Decimal: IEEE 754 Decimal Floating Point Numbers
 :toc: left
 :toclevels: 4
 :idprefix:
@@ -15,6 +14,9 @@ https://www.boost.org/LICENSE_1_0.txt
 
 :leveloffset: +1
 
+= Decimal: IEEE 754 Decimal Floating Point Numbers
+Matt Borland and Chris Kormanyos
+
 include::decimal/overview.adoc[]
 include::decimal/api_reference.adoc[]
 include::decimal/generic_decimal.adoc[]