Update CHANGELOG for libaom v3.6.0-rc3

No changes to AUTHORS.

Bug: aomedia:3342
Change-Id: I38f9639928e8cf957105d3dde2e7cafb12fe8993

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index 8253f6d..b6afcce 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-2023-01-20 v3.6.0
+2023-02-03 v3.6.0
   This release includes compression efficiency and perceptual quality
   improvements, speedup and memory optimizations, and some new features.
   This release is ABI compatible with the last release.
@@ -42,8 +42,6 @@
         resolutions).
     * ~5% reduction in heap memory requirements for RTC, speed 6 to 10.
     * AVIF:
-      o Support multi-threading for deltaq-mode = 3, --allintra mode, 2x
-        faster than before.
       o 4-5% speedup for speed 9 in still-picture encoding mode.
       o 3-4% heap memory reduction in still-picture encoding mode for
         360p-720p resolutions with multiple threads.
@@ -57,11 +55,14 @@
       av1_wiener_convolve_add_src_neon().
     * chromium:1393384 Avoid scene detection on spatial resize.
     * aomedia:3308 Remove color artifacts under high motion.
-    * aomedia:3310 Avoid out of memory failures with Visual Studio 2017
-      and 2019 for Win32 x86 builds.
+    * aomedia:3310 Avoid out of memory failures with Visual Studio 2017,
+      2019, and 2022 for Win32 x86 builds.
     * aomedia:3346 Make SVC work properly for screen content.
+    * aomedia:3348 Fix a bug where an uninitialized search_site is used.
     * aomedia:3365 Work around what seems like a Visual Studio 2022
       compiler optimization bug.
+    * aomedia:3369 Incorrect PSNR values reported by libaom for 12-bit
+      encode.
 
 2022-08-31 v3.5.0
   This release is ABI compatible with the last one, including speedup and memory