Bump actions/checkout from 5 to 6 (#6)

Author: dependabot[bot]

.github/workflows/rust.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Rust Toolchain
         uses: actions-rs/toolchain@v1.0.7