doc/next: document new image/jpeg DCT in release notes

Fixes #75603.

Change-Id: I0b4b93af467b97c2d4b5703e31605ff4f7970260
Reviewed-on: https://go-review.googlesource.com/c/go/+/706736
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Russ Cox <rsc@golang.org>

diff --git a/doc/next/6-stdlib/99-minor/image/jpeg/75603.md b/doc/next/6-stdlib/99-minor/image/jpeg/75603.md
new file mode 100644 (file)
index 0000000..4342176
--- /dev/null
+++ b/doc/next/6-stdlib/99-minor/image/jpeg/75603.md
@@ -0,0 +1,2 @@
+The JPEG encoder and decoder have been replaced with new, faster, more accurate implementations.
+Code that expects specific bit-for-bit outputs from the encoder or decoder may need to be updated.