Apply suggestion from @msyyc

Author: msyyc

.chronus/changes/python-drop-39-2026-4-27-6-50-0.md

@@ -1,6 +1,6 @@
 ---
 # Change versionKind to one of: internal, fix, dependencies, feature, deprecation, breaking
-changeKind: breaking
+changeKind: deprecation
 packages:
   - "@typespec/http-client-python"
 ---