fix(release): handle missing dnf in aarch64 manylinux container

[polaz]

Problem

Build embedded / aarch64 (ubuntu-latest) fails in Release v1.0.1:

/home/runner/work/_temp/run-maturin-action.sh: line 21: dnf: command not found
The process '/usr/bin/docker' failed with exit code 127

The aarch64 manylinux_2_28 container does not have dnf in PATH. The before-script falls through with exit code 127 (bash "command not found"), which docker propagates.

Fix

Make before-script fall through dnf → yum → apt-get so protoc installs regardless of which package manager is available.

Acceptance criteria

• Build embedded / aarch64 (ubuntu-latest) passes in Release workflow

[coderabbitai]

🔗 Related PRs

#40 - ci(release): fix embedded wheel builds for Windows, macOS, and Linux aarch64 [merged]

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