Enable long artwork paths before Windows checkout

.github/workflows/windows.yml

@@ -29,6 +29,9 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 60
     steps:
+      - name: Enable long paths for bundled artwork proof files
+        shell: pwsh
+        run: git config --global core.longpaths true
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with: