ci: use setup-rust-toolchain as it works reliably

Author: auxesis

.github/workflows/test-eql.yml

@@ -41,16 +41,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install rust
-        shell: /bin/bash -l {0}
-        run: |
-          rustup toolchain install stable --profile minimal --no-self-update
-          rustup component add rustfmt
-
-      - name: Setup Rust cache
-        uses: Swatinem/rust-cache@v2
-        with:
-          cache-all-crates: true
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+         with:
+           toolchain: stable
+           components: rustfmt
+           cache: true
+           cache-all-crates: true
 
       - uses: jdx/mise-action@v2
         with: