Release v4.0.12. Bootloader for Linux4SAM 2025.10.

Set 4.0.12-rc2 for Linux4SAM 2025.10.

Set v4.0.12-rc1 tag for preparing Linux4SAM 2025.10.

Set tag name as v4.0.11 to supplement 4.0.11 one.

4.0.11-rc5 at91bootstrap tag

4.0.11-rc4 at91bootstrap tag

4.0.11-rc3 at91bootstrap tag

v4.0.11-rc2 tag

rc-1 tag