Update lammps.book

doc/src/lammps.book

@@ -9,9 +9,18 @@ Packages_standard.html
 Packages_user.html
 Packages_details.html
 Speed.html
+Speed_bench.html
+Speed_measure.html
+Speed_tips.html
+Speed_packages.html
+Speed_gpu.html
+Speed_intel.html
+Speed_kokkos.html
+Speed_omp.html
+Speed_opt.html
+Speed_compare
 Section_howto.html
 Examples.html
-Section_perf.html
 Tools.html
 Modify.html
 Modify_overview.html