chore(deps): bump rust base image to 1.91.1 in reth Dockerfile

[edilsonGoncalvesR]

Summary

Update Rust base image used to build base-reth-node from rust:1.88 to rust:1.91.1.

Details

• reth/Dockerfile: FROM rust:1.88 AS reth-base → FROM rust:1.91.1 AS reth-base.
• Rust 1.91.1 is the latest stable release and includes fixes for two regressions introduced in 1.91.0 (Wasm #[link(wasm_import_module)] regression and Cargo target-dir locking on illumos).

Ref:

• https://blog.rust-lang.org/2025/11/10/Rust-1.91.1/

Testing

Build reth image:

docker build -f reth/Dockerfile -t node-reth:rust-1.91.1 .

[cb-heimdall]

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