Lower minimum Rust version from 1.92 to 1.91 (#18)

* Initial plan

* chore: lower rust-version from 1.92 to 1.88

Co-authored-by: overtrue <1472352+overtrue@users.noreply.github.com>

* chore: update rust-version to 1.91 to match Alpine 3.23

Co-authored-by: overtrue <1472352+overtrue@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: overtrue <1472352+overtrue@users.noreply.github.com>

Author: Copilot

Cargo.toml

@@ -5,7 +5,7 @@ members = ["crates/cli", "crates/core", "crates/s3"]
 [workspace.package]
 version = "0.1.4"
 edition = "2024"
-rust-version = "1.92"
+rust-version = "1.91"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rustfs/cli"
 homepage = "https://github.com/rustfs/cli"