Add exception for RUSTSEC-2024-0370

This transitive dependency is used by some of our examples. The advisory
is informational and not about an actual issue.

Our MSRV currently prevents us from upgrading to a newer version of
clap. When bumping MSRV, we shall look into newer versions of clap to
resolve this issue.

deny.toml

@@ -48,6 +48,7 @@ yanked = "deny"
 # output a note when they are encountered.
 ignore = [
     "RUSTSEC-2021-0145", # caused by unmaintained atty
+    "RUSTSEC-2024-0370", # caused by unmaintained proc-macro-error used by some examples
 ]
 # Threshold for security vulnerabilities, any vulnerability with a CVSS score
 # lower than the range specified will be ignored. Note that ignored advisories