Try double quote and line escaper

See: http://blogs.perl.org/users/tinita/2018/03/strings-in-yaml---to-quote-or-not-to-quote.html

Author: ax4

.github/workflows/upload.yml

@@ -19,4 +19,4 @@ jobs:
           uses: actions/upload-artifact@v2
           with:	
             name: .exe test	
-            path: 'build/DanmakuTree *.exe\n!build/*Setup*.exe'
+            path: "build/DanmakuTree *.exe\n!build/*Setup*.exe"