build: the libavr pin advances to the v9 era

Built and tested against it in a clean checkout of this port, through its own
submodule rather than a working-tree override, so the pin is what was proved.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
2026-08-01 18:48:31 +02:00
parent 546b1589a3
commit e9c3897d4f

2
libavr

Submodule libavr updated: c01b19b08f...3588014039