v1.33.0

This is a major Buildroot and Linux update. It should be seamless for most
1.32.0 users.

• Changes

  • Refresh ramoops-overlay.dts. This actually changes the default pstore
    settings to reserve less DRAM based on experience of not needing nearly as
    much. Settings can be overridden now via the config.txt.
  • Use EEx to generate the fwup.conf. This removes a lot of repetition. If
    you've made a custom fwup.conf, please review git commit log for details.

• Updated dependencies

  • Linux 6.12.47
  • nerves_system_br 1.33.0
    • Buildroot 2025.11
    • Erlang/OTP 28.3
    • fwup 1.15.0
    • erlinit 1.15.1
    • nerves_heart 2.5.0
    • boardid 1.15.0