🔒 Ignore CVE-2022-42969 until tox 4.0

Used by tox:
```
❯ poetry show py
 name         : py
 version      : 1.11.0
 description  : library with cross-python path, ini-parsing, io, code, log facilities

required by
 - tox >=1.4.17
```

But tox does not use the affected part of the library
- ref: tox-dev/tox#2524 (comment)

tox.ini

@@ -90,7 +90,8 @@ commands = pre-commit run {posargs} -vv --all-files --color always
 [testenv:security]
 skip_install = true
 deps = safety
-commands = safety check --full-report -r {toxinidir}/requirements-all.txt
+commands = safety check --full-report -r {toxinidir}/requirements-all.txt \
+    --ignore=51457 # CVE-2022-42969
 
 [testenv:docs]
 extras =