# Description of Changes
This PR updates the `check_properties.yml` workflow to refine the
file-matching regex for properties files.
### **What was changed:**
- Modified the regex used in two locations:
1. In the GitHub CLI (`gh`) command to filter changed files:
```diff
- '^src/main/resources/messages_[a-zA-Z_]+\.properties$'
+
'^src/main/resources/messages_[a-zA-Z_]{2}_[a-zA-Z_]{2,7}\.properties$'
```
2. In the code to match relevant property files:
```diff
- /^src\/main\/resources\/messages_[a-zA-Z_]+\.properties$/
+
/^src\/main\/resources\/messages_[a-zA-Z_]{2}_[a-zA-Z_]{2,7}\.properties$/
```
### **Why the change was made:**
- The previous regex matched any property files with loosely defined
patterns, including invalid or unintended formats.
- The updated regex ensures stricter matching of valid locale patterns:
- Locale codes in the format `xx_XX` where:
- `xx` represents a 2-character language code.
- `XX` represents a 2-7 character region code.
### **Challenges encountered:**
- Ensuring compatibility across both the GitHub CLI command.
- Avoiding edge cases where valid property files might be excluded
unintentionally.
Closes # (issue_number)
---
## Checklist
### General
- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [x] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings
### Documentation
- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)
### UI Changes (if applicable)
- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)
### Testing (if applicable)
- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.