Fix internal links

content/reference_hardware/_index.md

content/reference_hardware/hardware/amd64.md

content/reference_hardware/hardware/arm32.md

content/reference_hardware/hardware/arm64.md

.../reference_hardware/setup_guides/imx6q_sabrelite_setup.md

content/reference_hardware/setup_guides/rpi4_setup.md

...nt/reference_hardware/setup_guides/upsquared6000_setup.md

..._hardware/setup_lava_guides/imx6q_sabrelite_setup_lava.md

...t/reference_hardware/setup_lava_guides/rpi4_setup_lava.md

...ce_hardware/setup_lava_guides/upsquared6000_setup_lava.md

content/release/18/18.06/releasenotes.md

content/release/v2021/v2021.0/releasenotes.md

content/release/v2021/v2021.1/releasenotes.md

content/release/v2021/v2021.2/releasenotes.md

content/release/v2021/v2021dev2/releasenotes.md

content/release/v2021/v2021dev3/releasenotes.md

content/release/v2021/v2021pre/releasenotes.md

content/release/v2022/v2022.0/releasenotes.md

content/release/v2022/v2022.1/releasenotes.md

content/release/v2022/v2022.2/releasenotes.md