[BUG] warnings in Documentation build (document is referenced in multiple toctrees)

[raiden00pl]

Description / Steps to reproduce the issue

some files are referenced in multiple toctrees:

/home/raiden00/git/RTOS/nuttx/nuttx/Documentation/components/drivers/special/power/pm/index.rst: document is referenced in multiple toctrees: ['components/drivers/special/power/index', 'guides/changing_systemclockconfig'], selecting: guides/changing_systemclockconfig <- components/drivers/special/power/pm/index
/home/raiden00/git/RTOS/nuttx/nuttx/Documentation/platforms/arm/goldfish/goldfish_timer.rst: document is referenced in multiple toctrees: ['platforms/arm/goldfish/index', 'platforms/arm/index'], selecting: platforms/arm/index <- platforms/arm/goldfish/goldfish_timer
/home/raiden00/git/RTOS/nuttx/nuttx/Documentation/platforms/arm/nrf52/ieee802154.rst: document is referenced in multiple toctrees: ['platforms/arm/index', 'platforms/arm/nrf52/index'], selecting: platforms/arm/nrf52/index <- platforms/arm/nrf52/ieee802154
/home/raiden00/git/RTOS/nuttx/nuttx/Documentation/platforms/sim/network_linux.rst: document is referenced in multiple toctrees: ['platforms/index', 'platforms/sim/index'], selecting: platforms/sim/index <- platforms/sim/network_linux
/home/raiden00/git/RTOS/nuttx/nuttx/Documentation/platforms/sim/network_vpnkit.rst: document is referenced in multiple toctrees: ['platforms/index', 'platforms/sim/index'], selecting: platforms/sim/index <- platforms/sim/network_vpnkit

On which OS does this issue occur?

[OS: Linux]

What is the version of your OS?

doesn't matter

NuttX Version

master

Issue Architecture

[Arch: all]

Issue Area

[Area: Other]

Verification

• I have verified before submitting the report.