GHSA-39fp-mqmm-gxj6

### Impact
A vulnerability was found in the Language class that allowed DoS attacks. This vulnerability can be exploited by an attacker to consume a large amount of memory on the server.

### Patches
Upgrade to v4.4.7 or later. See [upgrading guide](https://codeigniter4.github.io/userguide/installation/upgrade_447.html).

### Workarounds
- Disabling Auto Routing prevents a known attack vector in the framework.
- Do not pass invalid values to the `lang()` function or `Language` class.

### References
- https://codeigniter4.github.io/userguide/outgoing/localization.html#language-localization
- https://codeigniter4.github.io/userguide/general/common_functions.html#lang