Add info about fdtd3d benchmark page #44

Job	Run time
Unit test riscv64 ubuntu 22.04 for layout	3h 1m 59s
Unit test riscv64 ubuntu 22.04 for layout	2h 58m 57s
Unit test riscv64 ubuntu 22.04 for layout	3h 2m 32s
Unit test riscv64 ubuntu 22.04 for layout	3h 3m 26s
Unit test riscv64 ubuntu 22.04 for grid	13m 45s
Unit test riscv64 ubuntu 22.04 for internalscheme	51m 35s
Unit test riscv64 ubuntu 22.04 for dumpers-loaders	14m 23s
Unit test riscv64 ubuntu 22.04 for internalscheme	49m 14s
Unit test riscv64 ubuntu 22.04 for coordinate	12m 50s
Unit test riscv64 ubuntu 22.04 for internalscheme	52m 56s
Unit test riscv64 ubuntu 22.04 for settings	9m 3s
Unit test riscv64 ubuntu 22.04 for internalscheme	51m 13s
Unit test riscv64 ubuntu 22.04 for approximation	10m 0s
Unit test riscv64 ubuntu 22.04 for complex	10m 37s
	16h 42m 30s

Provide feedback