Add info about fdtd3d benchmark page #43

Job	Run time
Unit test riscv64 ubuntu 22.04 for layout	3h 2m 48s
Unit test riscv64 ubuntu 22.04 for layout	2h 59m 56s
Unit test riscv64 ubuntu 22.04 for grid	14m 15s
Unit test riscv64 ubuntu 22.04 for layout	3h 0m 13s
Unit test riscv64 ubuntu 22.04 for dumpers-loaders	14m 51s
Unit test riscv64 ubuntu 22.04 for layout	3h 0m 40s
Unit test riscv64 ubuntu 22.04 for coordinate	9m 49s
Unit test riscv64 ubuntu 22.04 for internalscheme	53m 57s
Unit test riscv64 ubuntu 22.04 for settings	8m 31s
Unit test riscv64 ubuntu 22.04 for internalscheme	48m 39s
Unit test riscv64 ubuntu 22.04 for approximation	10m 11s
Unit test riscv64 ubuntu 22.04 for internalscheme	51m 34s
Unit test riscv64 ubuntu 22.04 for complex	8m 45s
Unit test riscv64 ubuntu 22.04 for internalscheme	49m 19s
	16h 33m 28s

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