Update CI

Author: mo8it

.github/workflows/rust.yml

@@ -18,25 +18,25 @@ jobs:
   fmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
-      - uses: DavidAnson/markdownlint-cli2-action@v9
+      - uses: DavidAnson/markdownlint-cli2-action@v16
         with:
           globs: "exercises/**/*.md"
       - name: Run cargo fmt
-        run: |
-          cargo fmt --all -- --check
+        run: cargo fmt --all -- --check
   test:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: swatinem/rust-cache@v2
       - name: Run cargo test
-        run: |
-          cargo test
+        run: cargo test
+      - name: Run rustlings dev check
+        run: cargo run -- dev check