ci-windows-shared-local.yml: enable gain maps

Enable AVIF_ENABLE_EXPERIMENTAL_GAIN_MAP in ci-windows-shared-local.yml.
https://github.com/AOMediaCodec/libavif/issues/2339 has been fixed.
diff --git a/.github/workflows/ci-windows-shared-local.yml b/.github/workflows/ci-windows-shared-local.yml
index 27d0a48..85b18fe 100644
--- a/.github/workflows/ci-windows-shared-local.yml
+++ b/.github/workflows/ci-windows-shared-local.yml
@@ -49,11 +49,12 @@
         cmake -G Ninja -S . -B build
         -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON
         -DAVIF_CODEC_AOM=LOCAL -DAVIF_CODEC_DAV1D=LOCAL
-        -DAVIF_JPEG=LOCAL -DAVIF_LIBSHARPYUV=LOCAL
+        -DAVIF_JPEG=LOCAL -DAVIF_LIBSHARPYUV=LOCAL -DAVIF_LIBXML2=LOCAL
         -DAVIF_LIBYUV=LOCAL -DAVIF_ZLIBPNG=LOCAL
         -DAVIF_BUILD_EXAMPLES=ON -DAVIF_BUILD_APPS=ON
         -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_METAV1=ON
         -DAVIF_ENABLE_EXPERIMENTAL_SAMPLE_TRANSFORM=ON
         -DAVIF_ENABLE_WERROR=ON $env:AVIF_CMAKE_C_COMPILER $env:AVIF_CMAKE_CXX_COMPILER