feat: update license to CECILL-2.1 and increment version to 2026.9.21 in pyproject.toml

Signed-off-by: d9pouces <github@19pouces.net>

pyproject.toml

@@ -21,11 +21,9 @@ authors = [
 ]
 classifiers = [
   'Development Status :: 5 - Production/Stable',
-  'License :: Other/Proprietary License',
   'Operating System :: POSIX :: Linux',
   'Operating System :: Unix',
   'Natural Language :: English',
-  "Private :: Do Not Upload",
   'Programming Language :: Python :: 3 :: Only',
   'Programming Language :: Python :: 3.13',
   'Programming Language :: Python :: 3.14'
@@ -38,14 +36,15 @@ dependencies = [
   "typer>=0.27.1"
 ]
 description = "Configure a device in an air-gapped environment."
-license = {text = "Proprietary"}
+license = "CECILL-2.1"
+license-files = ["LICENSE"]
 maintainers = [
   {name = "InterDiode", email = "contact@mail.interdiode.fr"}
 ]
 name = "id-configurator"
 readme = "README.md"
 requires-python = ">=3.13"
-version = "2026.9.20"
+version = "2026.9.21"
 
 [project.scripts]
 id-configurator = "id_configurator:main"