Fetch bundled gem from stdgems.org for Windows CI

Author: pocke

.github/workflows/windows.yml

@@ -27,8 +27,12 @@ jobs:
         run: |
           ruby -e '
             exit if "${{ matrix.ruby }}" != "ucrt" && "${{ matrix.ruby }}" != "mswin"
-            bundled_gems = Dir.glob("D:/ruby-${{ matrix.ruby }}/lib/ruby/gems/*/cache/*.gem")
-              .map { |path| File.basename(path, ".gem")[/^(.+)-[^-]+$/, 1] }
+
+            require "open-uri"
+            require "json"
+
+            res = URI.parse("https://stdgems.org/bundled_gems.json").read
+            bundled_gems = JSON.parse(res)["gems"].map{_1["gem"]}
             system "gem uninstall #{bundled_gems.join(" ")}", exception: true
           '
       - name: bundle install