Add towncrier mark

Author: asvetlov

CHANGES.rst

@@ -1,6 +1,19 @@
 Changes
 =======
 
+..
+    You should *NOT* be adding new change log entries to this file, this
+    file is managed by towncrier. You *may* edit previous change logs to
+    fix problems like typo corrections or such.
+    To add a new change log entry, please see
+    https://pip.pypa.io/en/latest/development/#adding-a-news-entry
+    we named the news folder "changes".
+
+    WARNING: Don't drop the next directive!
+
+.. towncrier release notes start
+
+
 1.2.0 (2024-12-12)
 ------------------