Update allowlist for Python 3.14 (#14388)

* Update allowlist for Python 3.14

* Add html.parser entry

Author: donBarbos

stdlib/@tests/stubtest_allowlists/py314.txt

@@ -3,6 +3,15 @@
 # ====================================================================
 
 concurrent.interpreters
+concurrent.futures.InterpreterPoolExecutor.__init__
+concurrent.futures.InterpreterPoolExecutor.prepare_context
+concurrent.futures.interpreter.ExecutionFailed
+concurrent.futures.interpreter.InterpreterPoolExecutor.__init__
+concurrent.futures.interpreter.InterpreterPoolExecutor.prepare_context
+concurrent.futures.interpreter.WorkerContext.__init__
+concurrent.futures.interpreter.WorkerContext.prepare
+concurrent.futures.interpreter.do_call
+html.parser.HTMLParser.parse_comment
 multiprocessing.managers.BaseListProxy.clear
 multiprocessing.managers.BaseListProxy.copy
 multiprocessing.managers.DictProxy.__ior__