fix: lower msrv to 1.79.0

Author: Leandros

Cargo.lock

@@ -2,7 +2,7 @@
 name = "cargo-nfpm"
 version = "0.1.1"
 edition = "2021"
-rust-version = "1.80.0"
+rust-version = "1.79.0"
 description = "A simple and lightweight Cargo plugin for using nFPM from Any Rust project"
 license = "MIT OR Apache-2.0"
 authors = ["Arvid Gerstmann <github@arvid.io>"]