add rust-src component to clippy action

.github/workflows/ci.yml

@@ -60,6 +60,8 @@ jobs:
     - uses: actions/checkout@v2
     - name: rust toolchain
       run: rustup show
+    - name: rust component-src
+      run:  rustup component add rust-src 
     - uses: olix0r/cargo-action-fmt@ee1ef42932e44794821dab57ef1bf7a73df8b21f
     - uses: extractions/setup-just@v1
     - name: run just clippy