gh-95724: Clarify taskgroups.py license. (GH-95847)

(cherry picked from commit 7da4937)

Co-authored-by: Yury Selivanov <[email protected]>

Author: miss-islington

Lib/asyncio/taskgroups.py

@@ -1,4 +1,5 @@
-# Adapted with permission from the EdgeDB project.
+# Adapted with permission from the EdgeDB project;
+# license: PSFL.
 
 
 __all__ = ["TaskGroup"]

Lib/test/test_asyncio/test_taskgroups.py

@@ -1,4 +1,5 @@
-# Adapted with permission from the EdgeDB project.
+# Adapted with permission from the EdgeDB project;
+# license: PSFL.
 
 
 import asyncio