chore: bump version to 2025.9

Author: nijel

pyproject.toml

@@ -34,7 +34,7 @@ license = "MIT"
 license-files = ["LICENSE"]
 name = "weblate-language-data"
 requires-python = ">=3.9"
-version = "2025.8"
+version = "2025.9"
 
 [project.optional-dependencies]
 dev = [