Remove gem cache for Windows

Author: pocke

.github/workflows/windows.yml

@@ -20,6 +20,12 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
+
+      # ucrt and mswin have the dev version Ruby.
+      # It introduce checksum mismatches for bundled gems. So remove them before `bundle install`
+      - name: Purge gem caches
+        run: |
+          Remove-Item D:\ruby-${{ matrix.ruby }}\lib\ruby\gems\*\cache\*.gem
       - name: bundle install
         run: |
           bundle config set without profilers libs