ci: bump cargo-zigbuild to 0.23.4 to fix aarch64-linux-gnu build

[barakb]

The stable - aarch64-unknown-linux-gnu CI job has been failing at link time:

error: linking with `/root/.cache/cargo-zigbuild/0.19.8/zigcc-aarch64-unknown-linux-gnu-aef7.sh` failed: exit status: 1
  = note: error: unsupported linker arg: --fix-cortex-a53-843419
error: could not compile `text-to-cypher-node` (lib) due to 1 previous error

Cause

Recent Rust versions pass -Wl,--fix-cortex-a53-843419 when linking for aarch64-unknown-linux-gnu (rust-lang/rust#155453). The cargo-zigbuild 0.19.8 zigcc wrapper forwards that flag straight to Zig's linker, which rejects it. Since the build step runs rustup update stable before building, the job started failing as soon as a Rust release containing that change went out.

Fix

cargo-zigbuild 0.23.0 filters the argument out (rust-cross/cargo-zigbuild#452, src/zig/linker_args.rs). This bumps the pinned version from 0.19.8 to 0.23.4 in every zig-based matrix entry, keeping ci.yml and release.yml in sync:

• ci.yml: x86_64-unknown-linux-musl, aarch64-unknown-linux-gnu
• release.yml: x86_64-unknown-linux-musl, aarch64-unknown-linux-gnu, aarch64-unknown-linux-musl

cargo-zigbuild 0.23.4 requires Rust 1.88+, which is already satisfied by the preceding rustup update stable.

Verification

CI on this PR exercises the previously failing aarch64-unknown-linux-gnu cross-compile plus the musl target.

[coderabbitai]

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[Copilot]

🟢 Approval recommended

The change is a straightforward, consistent version pin update across the relevant CI/release workflow steps and is unlikely to impact runtime code behavior.

Pull request overview

This PR updates the GitHub Actions workflows to pin a newer cargo-zigbuild version so Zig-based cross-compilation jobs (notably aarch64-unknown-linux-gnu) succeed with newer Rust link flags.

Changes:

• Bump cargo-zigbuild from 0.19.8 to 0.23.4 in CI zig-based build matrix entries.
• Bump cargo-zigbuild from 0.19.8 to 0.23.4 in release workflow zig-based build matrix entries.

File summaries

File	Description
.github/workflows/release.yml	Updates the pinned cargo-zigbuild version used for Zig-based cross targets in release builds.
.github/workflows/ci.yml	Updates the pinned cargo-zigbuild version used for Zig-based cross targets in CI builds.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Lite

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