chore: stricter mypy checking

bin/update_pythons.py

@@ -122,7 +122,7 @@ class PyPyVersions:
         self.arch = arch_str
 
     def get_arch_file(self, release: dict[str, Any]) -> str:
-        urls = [
+        urls: list[str] = [
             rf["download_url"]
             for rf in release["files"]
             if "" in rf["platform"] == f"win{self.arch}"
@@ -131,7 +131,7 @@ class PyPyVersions:
 
     def update_version_windows(self, spec: Specifier) -> ConfigWinCP:
         releases = [r for r in self.releases if spec.contains(r["python_version"])]
-        releases = sorted(releases, key=lambda r: r["pypy_version"])
+        releases = sorted(releases, key=lambda r: r["pypy_version"])  # type: ignore
         releases = [r for r in releases if self.get_arch_file(r)]
 
         if not releases:
@@ -156,7 +156,7 @@ class PyPyVersions:
             raise RuntimeError("Other archs not supported yet on macOS")
 
         releases = [r for r in self.releases if spec.contains(r["python_version"])]
-        releases = sorted(releases, key=lambda r: r["pypy_version"])
+        releases = sorted(releases, key=lambda r: r["pypy_version"])  # type: ignore
 
         if not releases:
             raise RuntimeError(f"PyPy macOS {self.arch} not found for {spec}!")