Bump leftover version numbers

Author: 4LT

.github/workflows/rust.yml

@@ -60,10 +60,10 @@ jobs:
           channel: nightly
         - os: macos-latest
           target: x86_64-apple-darwin
-          channel: 1.49.0
+          channel: 1.56.1
         - os: windows-latest
           target: x86_64-pc-windows-msvc
-          channel: 1.49.0
+          channel: 1.56.1
         - os: ubuntu-latest
           target: x86_64-unknown-linux-gnu
           channel: beta