[tab:headers.cpp] Add <hazard_pointer> (#6586)

Author: jensmaurer

source/lib-intro.tex

@@ -1097,13 +1097,14 @@
 \tcode{<filesystem>} \\
 \tcode{<flat_map>} \\
 \tcode{<flat_set>} \\
-\columnbreak
 \tcode{<format>} \\
+\columnbreak
 \tcode{<forward_list>} \\
 \tcode{<fstream>} \\
 \tcode{<functional>} \\
 \tcode{<future>} \\
 \tcode{<generator>} \\
+\tcode{<hazard_pointer>} \\
 \tcode{<initializer_list>} \\
 \tcode{<iomanip>} \\
 \tcode{<ios>} \\