Merge tag 'efi-2026-10-rc2-2' of https://git.u-boot-project.org/u-boot/custodians...

Pull request efi-2026-10-rc2-2

CI: https://git.u-boot-project.org/u-boot/custodians/u-boot-efi/-/pipelines/839

Documentation:

* README: Slightly rephrase env set and env print paragraph
* cmd: gpt: Reinstate gpt setenv
* CONTRIBUTE: replace "as" with "like"

UEFI:

* Unify the memory map output of 'efi mem' and 'efidebug memmap'
* Print ISA-specific and unknown memory attributes
* Rix memory leak in efi_sigstore_parse_siglist
* Fix use of uninitialized guid in variable enumeration loops