bpo-41428: Documentation for PEP 604  (gh-22517)

diff --git a/Misc/ACKS b/Misc/ACKS
index 9be0e77..08449fe 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1257,6 +1257,7 @@
 Furkan Onder
 Koray Oner
 Ethan Onstott
+Ken Jin Ooi
 Piet van Oostrum
 Tomas Oppelstrup
 Jason Orendorff
diff --git a/Misc/NEWS.d/next/Documentation/2020-10-03-18-20-46.bpo-41428._ju1NE.rst b/Misc/NEWS.d/next/Documentation/2020-10-03-18-20-46.bpo-41428._ju1NE.rst
new file mode 100644
index 0000000..2c33393
--- /dev/null
+++ b/Misc/NEWS.d/next/Documentation/2020-10-03-18-20-46.bpo-41428._ju1NE.rst
@@ -0,0 +1 @@
+Add documentation for :pep:`604` (Allow writing union types as ``X | Y``).