Try to get libxml2 installed on windows.

Author: cfis

.github/workflows/mri.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby-pkgs@v1
         with:
           ruby-version: ${{ matrix.ruby }}
           apt-get: libxml2-dev