fix: ensure rustfmt is available in CI

Author: auxesis

.github/workflows/test-eql.yml

@@ -43,7 +43,9 @@ jobs:
 
       - name: Install rust
         shell: /bin/bash -l {0}
-        run: rustup toolchain install stable --profile minimal --no-self-update
+        run: |
+          rustup toolchain install stable --profile minimal --no-self-update
+          rustup component add rustfmt
 
       - name: Setup Rust cache
         uses: Swatinem/rust-cache@v2