Add taskName to LogRecord (#11609)

stdlib/logging/__init__.pyi

@@ -341,6 +341,9 @@ class LogRecord:
     stack_info: str | None
     thread: int | None
     threadName: str | None
+    if sys.version_info >= (3, 12):
+        taskName: str | None
+
     def __init__(
         self,
         name: str,