Sync MSRV in README

Fixes #112

.github/workflows/ci.yaml

@@ -36,7 +36,7 @@ jobs:
         channel: [stable, beta]
         include:
           - os: ubuntu-latest
-            # Should be sync with Cargo.toml
+            # Should be sync with Cargo.toml and README.
             channel: '1.70'
     runs-on: ${{ matrix.os }}
     steps:

Cargo.toml

@@ -13,7 +13,7 @@ members = [
 version = "0.0.0"
 edition = "2021"
 license = "MIT OR Apache-2.0"
-# Should be sync with CI.
+# Should be sync with CI and README.
 rust-version = "1.70"
 
 [profile.dev]

README.md

@@ -19,7 +19,7 @@ and is regularly updated.
 - If you use `nix-env`, run `nix-env -iA nixpkgs.nil`
 - If you use `nix profile`, run `nix profile install nixpkgs#nil`
 - If you want to compile it from source:
-  1. Install stable Rust toolchain >= 1.62
+  1. Install stable Rust toolchain >= 1.70
   1. Install nix >= 2.4 and make sure the binary `nix` is in your `PATH`.
   1. Build and install via `cargo install --git https://github.com/oxalica/nil nil`