Add exception for RUSTSEC-2024-0375

It's the transitive dependency atty again which we are pulling in
through clap. Same situation as with RUSTSEC-2024-0370, it's just no
maintained as of now.

deny.toml

@@ -49,6 +49,7 @@ yanked = "deny"
 ignore = [
     "RUSTSEC-2021-0145", # caused by unmaintained atty
     "RUSTSEC-2024-0370", # caused by unmaintained proc-macro-error used by some examples
+    "RUSTSEC-2024-0375", # caused by umnaintained atty (again, with migration hint)
 ]
 # Threshold for security vulnerabilities, any vulnerability with a CVSS score
 # lower than the range specified will be ignored. Note that ignored advisories