ci: fix malformed vet job YAML (doubled '- -' list marker)

Author: h4x0r

.github/workflows/ci.yml

@@ -57,8 +57,8 @@ jobs:
     # covered by an imported aggregate audit set (Google/Mozilla/Bytecode-Alliance/
     # Embark). Config in supply-chain/{config,audits,imports}.toml.
     steps:
-      - - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - - uses: dtolnay/rust-toolchain@21dc36fb71dd22e3317045c0c31a3f4249868b17 # stable
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: dtolnay/rust-toolchain@21dc36fb71dd22e3317045c0c31a3f4249868b17 # stable
       - name: Install cargo-vet
         uses: taiki-e/install-action@59012be0884e296ca2da49b530610e72c49039ad # v2.81.6
         with: