prepare to go back to apache 2.0

Author: kddubey

LICENSE.md

@@ -7,7 +7,7 @@ name = "grouping-trainer"
 dynamic = ["version"]
 description = "Training and evaluation for Sentry AI grouping"
 readme = "README.md"
-license = { file = "LICENSE.md" }
+license = { file = "LICENSE" }
 dependencies = [
     "accelerate==1.12.0",
     "datasets==4.4.1",