Update CHANGELOG, etc. for libaom v3.8.3

Bug: aomedia:3581
Change-Id: I8dcdbcab302f226b758433e7bae720f5d1b31d8e

.mailmap

diff --git a/.mailmap b/.mailmap
index 6d6e6302..7ddc582 100644
--- a/.mailmap
+++ b/.mailmap
@@ -98,6 +98,7 @@
 Tom Finegan <tomfinegan@google.com> <tomfinegan@chromium.org>
 Tristan Matthews <tmatth@videolan.org> <le.businessman@gmail.com>
 Venkat Sanampudi <sanampudi.venkatarao@ittiam.com>
+Vignesh Venkatasubramanian <vigneshv@google.com>
 Vitalii Dziumenko <vdziumenko@luxoft.com> <vdziumenko@luxoft.corp-partner.google.com>
 Wei-Ting Lin <weitinglin@google.com>
 Wei-Ting Lin <weitinglin@google.com> <weitingco@gmail.com>

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index c95ac37..35737c1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,19 @@
+2024-06-07 v3.8.3
+  This release includes several bug fixes. This release is ABI
+  compatible with the last release. See
+  https://aomedia.googlesource.com/aom/+log/v3.8.2..v3.8.3 for all the
+  commits in this release.
+
+  - Bug Fixes
+    * aomedia:2754, aomedia:3567: Ensure thread stack size is at least
+      256 KB
+    * aomedia:3382, chromium:339877165: update codec config after
+      svc/scale controls (CVE-2024-5493)
+    * aomedia:3561: libaom-3.8.2 armv7 Android build failed
+    * aomedia:3580: Allow g_timebase.num to be greater than
+      g_timebase.den
+    * av1_block_error_lp_neon: fix block_size param type
+
 2024-03-08 v3.8.2
   This release includes several bug fixes. This release is ABI
   compatible with the last release. See

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf0776e..4674396 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,7 @@
 #
 # We set SO_FILE_VERSION = [c-a].a.r
 set(LT_CURRENT 11)
-set(LT_REVISION 2)
+set(LT_REVISION 3)
 set(LT_AGE 8)
 math(EXPR SO_VERSION "${LT_CURRENT} - ${LT_AGE}")
 set(SO_FILE_VERSION "${SO_VERSION}.${LT_AGE}.${LT_REVISION}")