Rewrite cross to use dtolnay runner

As we do in other places stop using the `actions` runner and use the
`dtolnay` one to checkout toolchain.

While we are at it, use double quotes for `name` fields (this is a small
stylistic thing I have been introducing in an effort to make the yaml
files a bit easier to read).

Author: tcharding

.github/workflows/cross.yml

@@ -37,20 +37,16 @@ jobs:
           - x86_64-unknown-linux-musl
           # - x86_64-unknown-netbsd  # error in tests "error: test failed, to rerun pass '--lib'", disabled for now
     steps:
-      - name: Checkout Crate
-        uses: actions/checkout@v2
+      - name: "Checkout repo"
+        uses: actions/checkout@v4
       - uses: Swatinem/[email protected]
         with:
           key: ${{ matrix.feature }}${{ matrix.os }}
-      - name: Checkout Toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - name: Install target
+      - name: "Select toolchain"
+        uses: dtolnay/rust-toolchain@stable
+      - name: "Install target"
         run: rustup target add ${{ matrix.arch }}
-      - name: install cross
+      - name: "Install cross"
         run: cargo install cross
-      - name: run cross test
+      - name: "Run cross test"
         run: cross test --target ${{ matrix.arch }} --verbose