Update EmbarkStudios/cargo-deny-action action to v2

Author: renovate[bot]

.github/workflows/ci.yml

@@ -104,7 +104,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: EmbarkStudios/cargo-deny-action@v1
+      - uses: EmbarkStudios/cargo-deny-action@v2
         with:
           log-level: warn
           command: check