docs: Fix the layout in multiple .rst files for the PDF output #198

Job	Run time
populate-targets	2s
newt dump (bleprph-nrf52840pdk, ubuntu-latest)	24s
newt dump (bleprph-nrf52840pdk, windows-latest)	1m 37s
newt dump (bleprph-nrf52840pdk, macos-latest)	24s
newt dump (boot-nrf52dk, ubuntu-latest)	20s
newt dump (boot-nrf52dk, windows-latest)	1m 5s
newt dump (boot-nrf52dk, macos-latest)	21s
newt dump (btshell-nrf52840pdk, ubuntu-latest)	21s
newt dump (btshell-nrf52840pdk, windows-latest)	1m 26s
newt dump (btshell-nrf52840pdk, macos-latest)	21s
newt dump (btshell-nrf52dk, ubuntu-latest)	23s
newt dump (btshell-nrf52dk, windows-latest)	59s
newt dump (btshell-nrf52dk, macos-latest)	24s
newt dump (my_blinky_sim, ubuntu-latest)	25s
newt dump (my_blinky_sim, windows-latest)	57s
newt dump (my_blinky_sim, macos-latest)	27s
	9m 56s

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