Update python-slugify requirement from <9.0.0,>=1.2.1 to >=8.0.4,<9.0.0

Updates the requirements on [python-slugify](https://github.com/un33k/python-slugify) to permit the latest version.
- [Changelog](https://github.com/un33k/python-slugify/blob/master/CHANGELOG.md)
- [Commits](https://github.com/un33k/python-slugify/compare/1.2.1...v8.0.4)

---
updated-dependencies:
- dependency-name: python-slugify
  dependency-version: 8.0.4
  dependency-type: direct:production
...

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

requirements-docker.txt

@@ -1,7 +1,7 @@
 Pillow>=11.3.0
 psutil>=5.9.5
 requests>=2.31.0
-python-slugify>=1.2.1
+python-slugify>=8.0.4
 packaging>=23.2
 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>=5.9.5
 requests>=2.31.0
-python-slugify>=1.2.1
+python-slugify>=8.0.4
 raven>=6.0.0
 packaging>=23.2
 mozjpeg-lossless-optimization>=1.2.0

requirements-win7.txt

@@ -2,7 +2,7 @@ PySide6==6.1.3
 Pillow>=9
 psutil>=5.9.5
 requests>=2.31.0
-python-slugify>=1.2.1
+python-slugify>=8.0.4
 raven>=6.0.0
 packaging>=23.2
 mozjpeg-lossless-optimization>=1.2.0

requirements.txt

@@ -2,7 +2,7 @@ PySide6<6.10
 Pillow>=11.3.0
 psutil>=5.9.5
 requests>=2.31.0
-python-slugify>=1.2.1,<9.0.0
+python-slugify>=8.0.4,<9.0.0
 raven>=6.0.0
 packaging>=23.2
 mozjpeg-lossless-optimization>=1.2.0