Corrects path to mxgraph source

.github/workflows/electron-builder-win.yml

@@ -37,7 +37,7 @@ jobs:
         cd ..
         Remove-Item 'drawio-dev' -Recurse -Force
         cd drawio
-        Remove-Item 'etc','src\main\java','src\main\mxgraph','src\main\webapp\connect','src\main\webapp\shapes','src\main\webapp\stencils','src\main\webapp\service-worker*','src\main\webapp\workbox-*' -Recurse -Force
+        Remove-Item 'etc','src\main\java','src\main\webapp\mxgraph\src','src\main\webapp\connect','src\main\webapp\shapes','src\main\webapp\stencils','src\main\webapp\service-worker*','src\main\webapp\workbox-*' -Recurse -Force
         cd src\main\webapp\js
         Copy-Item "diagramly\DesktopLibrary.js","diagramly\ElectronApp.js"  -Destination "."
         Remove-Item 'atlas-viewer.min.js','atlas.min.js','cryptojs','deflate','diagramly','dropbox','embed*','freehand','grapheditor','integrate.min.js','jquery','jscolor','onedrive','orgchart','reader.min.js','rough','sanitizer','shapes.min.js','simplepeer','spin','viewer-static.min.js','viewer.min.js'  -Recurse -Force