Update to AVM v1.0.0

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8707067..e845fb2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,10 @@
 
 * avifenc: add --ignore-alpha flag to discard alpha channel on encode
 
+### Changed since 1.4.2
+
+* Update LocalAvm.cmake: v1.0.0
+
 ## [1.4.2] - 2026-05-26
 
 ### Added since 1.4.1

cmake/Modules/LocalAvm.cmake

diff --git a/cmake/Modules/LocalAvm.cmake b/cmake/Modules/LocalAvm.cmake
index 558a8a1..2011086 100644
--- a/cmake/Modules/LocalAvm.cmake
+++ b/cmake/Modules/LocalAvm.cmake
@@ -1,4 +1,4 @@
-set(AVIF_AVM_GIT_TAG research-v15.0.0)
+set(AVIF_AVM_GIT_TAG v1.0.0)
 
 message(CHECK_START "libavif(AVIF_CODEC_AVM=LOCAL): fetching and configuring avm")