Use ty's None-union truthiness rule

Author: adamtheturtle

pyproject.toml

@@ -92,7 +92,7 @@ dev = [
     "strict-kwargs==2026.8.28.post2",
     "sybil==10.1.0",
     "towncrier==26.9.0",
-    "ty==0.0.84",
+    "ty==0.0.85",
     "types-requests==2.33.0.20261006",
     "vale==3.22.0.0",
     "vulture==2.16",