MSP-Greg actions is now ruby organization

Author: hsbt

.github/workflows/windows.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Ruby
-        uses: MSP-Greg/setup-ruby-pkgs@v1
+        uses: ruby/setup-ruby-pkgs@v1
         with:
           ruby-version: ${{ matrix.ruby }}
           vcpkg: libyaml