ci: bump EmbarkStudios/cargo-deny-action from 2.0.19 to 2.0.20 (#171)

Bumps [EmbarkStudios/cargo-deny-action](https://github.com/embarkstudios/cargo-deny-action) from 2.0.19 to 2.0.20.
- [Release notes](https://github.com/embarkstudios/cargo-deny-action/releases)
- [Commits](EmbarkStudios/cargo-deny-action@a531616...bb137d7)

---
updated-dependencies:
- dependency-name: EmbarkStudios/cargo-deny-action
  dependency-version: 2.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -280,7 +280,7 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-      - uses: EmbarkStudios/cargo-deny-action@a531616d8ce3b9177443e48a1159bc945a099823 # v2
+      - uses: EmbarkStudios/cargo-deny-action@bb137d7af7e4fb67e5f82a49c4fce4fad40782fe # v2
 
   coverage:
     name: Coverage