cleanup typing

Author: bdraco

script/generate_release_notes.py

@@ -73,6 +73,7 @@
 from __future__ import annotations
 
 import argparse
+from collections.abc import Callable
 from dataclasses import dataclass
 from datetime import datetime
 import json
@@ -371,8 +372,8 @@ def get_pr_numbers_from_commits(self, base_ref: str, head_ref: str) -> list[int]
     def _collect_prs_from_tags(
         self,
         all_tags: set[str],
-        tag_format: callable,
-        prev_tag_format: callable,
+        tag_format: Callable[[int], str],
+        prev_tag_format: Callable[[int], str | None],
         release_type: str,
         max_releases: int = 100,
     ) -> set[int]: