📝 Sync README.md

# Description of Changes

Please provide a summary of the changes, including:

- **What was changed**  
Updated the values of `split.desc.6`, `split.desc.7`, and `split.desc.8`
in `src/main/resources/messages_zh_CN.properties` to correct the page
numbers:

- **Why the change was made**  
The previous numbering was inconsistent and would have led to incorrect
split outputs in the Chinese UI. This ensures that users splitting a
document see the correct page ranges.

- **Translation Method**  
The correction of these translation strings was generated and verified
using AI assistance.

Closes #3529

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] 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)

- [ ] 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.

README.md

@@ -128,7 +128,7 @@ Stirling-PDF currently supports 40 languages!
 | English (English) (en_GB)                    | ![100%](https://geps.dev/progress/100) |
 | English (US) (en_US)                         | ![100%](https://geps.dev/progress/100) |
 | French (Français) (fr_FR)                    | ![92%](https://geps.dev/progress/92)   |
-| German (Deutsch) (de_DE)                     | ![99%](https://geps.dev/progress/99)   |
+| German (Deutsch) (de_DE)                     | ![100%](https://geps.dev/progress/100)   |
 | Greek (Ελληνικά) (el_GR)                     | ![91%](https://geps.dev/progress/91)   |
 | Hindi (हिंदी) (hi_IN)                          | ![91%](https://geps.dev/progress/91)   |
 | Hungarian (Magyar) (hu_HU)                   | ![99%](https://geps.dev/progress/99)   |
@@ -143,7 +143,7 @@ Stirling-PDF currently supports 40 languages!
 | Portuguese (Português) (pt_PT)               | ![91%](https://geps.dev/progress/91)   |
 | Portuguese Brazilian (Português) (pt_BR)     | ![97%](https://geps.dev/progress/97)   |
 | Romanian (Română) (ro_RO)                    | ![75%](https://geps.dev/progress/75)   |
-| Russian (Русский) (ru_RU)                    | ![93%](https://geps.dev/progress/93)   |
+| Russian (Русский) (ru_RU)                    | ![99%](https://geps.dev/progress/99)   |
 | Serbian Latin alphabet (Srpski) (sr_LATN_RS) | ![60%](https://geps.dev/progress/60)   |
 | Simplified Chinese (简体中文) (zh_CN)         | ![93%](https://geps.dev/progress/93)   |
 | Slovakian (Slovensky) (sk_SK)                | ![69%](https://geps.dev/progress/69)   |
@@ -154,7 +154,7 @@ Stirling-PDF currently supports 40 languages!
 | Tibetan (བོད་ཡིག་) (zh_BO)                     | ![88%](https://geps.dev/progress/88) |
 | Traditional Chinese (繁體中文) (zh_TW)        | ![99%](https://geps.dev/progress/99)   |
 | Turkish (Türkçe) (tr_TR)                     | ![97%](https://geps.dev/progress/97)   |
-| Ukrainian (Українська) (uk_UA)               | ![96%](https://geps.dev/progress/96)   |
+| Ukrainian (Українська) (uk_UA)               | ![99%](https://geps.dev/progress/99)   |
 | Vietnamese (Tiếng Việt) (vi_VN)              | ![73%](https://geps.dev/progress/73)   |
 | Malayalam (മലയാളം) (ml_ML)              | ![99%](https://geps.dev/progress/99)   |
 

src/main/resources/messages_zh_CN.properties

@@ -1075,9 +1075,9 @@ split.desc.2=如选择1,3,7-9将把一个 10 页的文件分割成6个独立的P
 split.desc.3=文档 #1：第 1 页
 split.desc.4=文档 #2：第 2 页和第 3 页
 split.desc.5=文档 #3：第 4 页、第 5 页、第 6 页和第 7 页
-split.desc.6=文档 #4：第 7 页
-split.desc.7=文档 #5：第 8 页
-split.desc.8=文档 #6：第 9 页和第 10 页
+split.desc.6=文档 #4：第 8 页
+split.desc.7=文档 #5：第 9 页
+split.desc.8=文档 #6：第 10 页
 split.splitPages=输入要分割的页面：
 split.submit=拆分