Change AVIF_ENABLE_EXPERIMENTAL_AVIR to ..._METAV1

AVIF_ENABLE_EXPERIMENTAL_AVIR has been renamed
AVIF_ENABLE_EXPERIMENTAL_METAV1.
diff --git a/.github/workflows/ci-windows-installed.yml b/.github/workflows/ci-windows-installed.yml
index 18a1188..0c6200b 100644
--- a/.github/workflows/ci-windows-installed.yml
+++ b/.github/workflows/ci-windows-installed.yml
@@ -75,7 +75,7 @@
         -DAVIF_BUILD_TESTS=ON -DAVIF_ENABLE_GTEST=ON -DAVIF_GTEST=LOCAL
         -DAVIF_ENABLE_EXPERIMENTAL_YCGCO_R=ON
         -DAVIF_ENABLE_EXPERIMENTAL_GAIN_MAP=ON
-        -DAVIF_ENABLE_EXPERIMENTAL_AVIR=ON
+        -DAVIF_ENABLE_EXPERIMENTAL_METAV1=ON
         -DAVIF_ENABLE_EXPERIMENTAL_SAMPLE_TRANSFORM=ON
         -DAVIF_ENABLE_WERROR=ON $env:AVIF_CMAKE_C_COMPILER $env:AVIF_CMAKE_CXX_COMPILER
     - name: Build libavif (ninja)