Merge tag 'doc-2025-01-rc6' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request doc-2025-01-rc6

Fix a number of typos

* cmd: bootmenu typo 'read'
* cmd/rng: fix long help text
* crypto: typo volatge
* board: freescale: typo volatge
* scripts: add volatge to spelling.txt
* doc: fit: Format image tree source example