ci: try installing clippy a different way

Author: ctron

.github/workflows/ci.yaml

@@ -80,7 +80,8 @@ jobs:
 
       - name: Install Rust ${{ matrix.rust }}
         run: |
-          rustup install ${{ matrix.rust }} --component clippy
+          rustup install ${{ matrix.rust }}
+          rustup toolchain install ${{ matrix.rust }} --component clippy
 
       - name: Install dependencies
         run: ${{ matrix.install }}