fix license

Author: mahenzon

pyproject.toml

@@ -6,7 +6,8 @@ description = "Taskiq pipelines for task chaining."
 authors = ["Pavel Kirilin <win10@list.ru>"]
 readme = "README.md"
 repository = "https://github.com/taskiq-python/taskiq-pipelines"
-license = "LICENSE"
+license = "MIT"
+license-files = ["LICENSE"]
 classifiers = [
     "Typing :: Typed",
     "Programming Language :: Python",