proj: fix license text

Author: cbespin

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "pixel_clusterizer"
 version = "3.1.7"
-license = { "text" = "The MIT License (MIT)" }
+license = "MIT"
 description = "A fast, generic, and easy to use clusterizer to cluster hits of a pixel matrix in Python."
 readme = {file = "README.md", content-type = "text/markdown"}
 requires-python = ">=3.10"
@@ -21,4 +21,4 @@ dependencies = [
 keywords=["cluster", "clusterizer", "pixel"]
 
 [project.urls]
-"Repository" = "https://github.com/SiLab-Bonn/pixel_clusterizer"
+"Repository" = "https://github.com/SiLab-Bonn/pixel_clusterizer"