cargo: update MSRV to 1.71

Cargo.toml

@@ -4,7 +4,7 @@ repository = "https://github.com/coreos/afterburn"
 license = "Apache-2.0"
 edition = "2021"
 # when updating this, also update README.md and docs/index.md
-rust-version = "1.66.0"
+rust-version = "1.71.0"
 exclude = ["/.cci.jenkinsfile", "/.github", "/.gitignore"]
 authors = [ "Stephen Demos <[email protected]>",
             "Luca Bruno <[email protected]>" ]

README.md

@@ -1,7 +1,7 @@
 # Afterburn
 
 [![crates.io](https://img.shields.io/crates/v/afterburn.svg)](https://crates.io/crates/afterburn)
-![minimum rust 1.66](https://img.shields.io/badge/rust-1.66%2B-orange.svg)
+![minimum rust 1.71](https://img.shields.io/badge/rust-1.71%2B-orange.svg)
 
 Afterburn is a one-shot agent for cloud-like platforms which interacts with provider-specific metadata endpoints.
 It is typically used in conjunction with [Ignition](https://github.com/coreos/ignition).

docs/index.md

@@ -5,7 +5,7 @@ nav_order: 1
 # Afterburn
 
 [![crates.io](https://img.shields.io/crates/v/afterburn.svg)](https://crates.io/crates/afterburn)
-![minimum rust 1.66](https://img.shields.io/badge/rust-1.66%2B-orange.svg)
+![minimum rust 1.71](https://img.shields.io/badge/rust-1.71%2B-orange.svg)
 
 Afterburn is a one-shot agent for cloud-like platforms which interacts with provider-specific metadata endpoints.
 It is typically used in conjunction with [Ignition](https://github.com/coreos/ignition).

docs/release-notes.md

@@ -16,6 +16,7 @@ Minor changes:
 
 Packaging changes:
 
+Require Rust ≥ 1.71.0
 Specify features depended on from Nix