Add CDLA-Permissive-2.0 license to cargo deny allowlist

The newly listed license is permissive. Specifically:

- https://cdla.dev/permissive-2-0/
- https://spdx.org/licenses/CDLA-Permissive-2.0.html

It is newly used by `webpki-roots` for data that were formerly
marked as being licensed under MPL-2.0. For full details, see:

- https://github.com/rustls/webpki-roots/releases/tag/v%2F0.26.9
- rustls/webpki-roots#88
- mozilla/www.ccadb.org#188

MPL-2.0 is not delisted, as we still need it at least for `uluru`.

Author: EliahKagan

deny.toml

@@ -25,6 +25,7 @@ allow = [
     "Apache-2.0",
     "BSD-3-Clause",
     "BSL-1.0",
+    "CDLA-Permissive-2.0",
     "MIT",
     "MIT-0",
     "ISC",