📝 Sync README.md

# Description of Changes

Please provide a summary of the changes, including:

---

## 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)
- [ ] 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.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

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)   |

src/main/resources/messages_de_DE.properties

@@ -364,9 +364,9 @@ home.compressPdfs.title=Komprimieren
 home.compressPdfs.desc=PDF komprimieren um die Dateigröße zu reduzieren
 compressPdfs.tags=komprimieren,verkleinern,minimieren
 
-home.unlockPDFForms.title=Unlock PDF Forms
-home.unlockPDFForms.desc=Remove read-only property of form fields in a PDF document.
-unlockPDFForms.tags=remove,delete,form,field,readonly
+home.unlockPDFForms.title=Schreibgeschützte PDF-Formfelder entfernen
+home.unlockPDFForms.desc=Entfernen Sie die schreibgeschützte Eigenschaft von Formularfeldern in einem PDF-Dokument.
+unlockPDFForms.tags=entfernen,löschen,form,feld,schreibgeschützt
 
 home.changeMetadata.title=Metadaten ändern
 home.changeMetadata.desc=Ändern/Entfernen/Hinzufügen von Metadaten aus einem PDF-Dokument
@@ -1197,9 +1197,9 @@ changeMetadata.selectText.5=Benutzerdefinierten Metadateneintrag hinzufügen
 changeMetadata.submit=Ändern
 
 #unlockPDFForms
-unlockPDFForms.title=Remove Read-Only from Form Fields
-unlockPDFForms.header=Unlock PDF Forms
-unlockPDFForms.submit=Remove
+unlockPDFForms.title=Entfernen Sie schreibgeschützte Formfelder
+unlockPDFForms.header=Schreibgeschützte PDF-Formfelder entfernen
+unlockPDFForms.submit=Entfernen
 
 #pdfToPDFA
 pdfToPDFA.title=PDF zu PDF/A