Update python-slugify requirement from <9.0.0,>=8.0.4 to >=9.0.0,<10.0.0

Updates the requirements on [python-slugify](https://github.com/un33k/python-slugify) to permit the latest version.
- [Release notes](https://github.com/un33k/python-slugify/releases)
- [Changelog](https://github.com/un33k/python-slugify/blob/master/CHANGELOG.md)
- [Commits](https://github.com/un33k/python-slugify/compare/v8.0.4...v9.0.0)

---
updated-dependencies:
- dependency-name: python-slugify
  dependency-version: 9.0.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements-docker.txt

@@ -1,7 +1,7 @@
 Pillow>=11.3.0
 psutil>=7.2.2
 requests>=2.34.2
-python-slugify>=8.0.4
+python-slugify>=9.0.0
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0

requirements-osx-legacy.txt

@@ -2,7 +2,7 @@ PySide6==6.4.3
 Pillow>=11.3.0
 psutil>=7.2.2
 requests>=2.34.2
-python-slugify>=8.0.4
+python-slugify>=9.0.0
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0

requirements-win7.txt

@@ -2,7 +2,7 @@ PySide6==6.1.3
 Pillow>=9
 psutil>=7.2.2
 requests>=2.32.4
-python-slugify>=8.0.4
+python-slugify>=9.0.0
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0

requirements.txt

@@ -2,7 +2,7 @@ PySide6<6.10
 Pillow>=11.3.0
 psutil>=7.2.2
 requests>=2.34.2
-python-slugify>=8.0.4,<9.0.0
+python-slugify>=9.0.0,<10.0.0
 packaging>=26.2
 mozjpeg-lossless-optimization>=1.2.0
 natsort>=8.4.0

setup.py

@@ -152,7 +152,7 @@ setuptools.setup(
         'Pillow>=9.3.0',
         'psutil>=5.9.5',
         'requests>=2.31.0',
-        'python-slugify>=1.2.1,<9.0.0',
+        'python-slugify>=1.2.1,<10.0.0',
         'mozjpeg-lossless-optimization>=1.2.0',
         'natsort>=8.4.0',
         'numpy>=1.22.4',