Issue #22191: Fix warnings.__all__.

Thanks to Jon Poler for the patch.
diff --git a/Misc/ACKS b/Misc/ACKS
index 4ebe074..f9a4426 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1052,6 +1052,7 @@
 Jean-François Piéronne
 Oleg Plakhotnyuk
 Remi Pointel
+Jon Poler
 Ariel Poliak
 Guilherme Polo
 Illia Polosukhin
diff --git a/Misc/NEWS b/Misc/NEWS
index 47ea776..cbe93b1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -19,6 +19,8 @@
 Library
 -------
 
+- Issue #22191: Fixed warnings.__all__.
+
 - Issue #21308: Backport numerous features from Python's ssl module. This is
   part of PEP 466.