build(webpack): fix copy-to path name

this will now end up in "src/public/app-dist/excalidraw/fonts/"

excalidraw *needs* the fonts to be in a folder called "fonts" as it appends the "EXCALIDRAW_ASSET_PATH" variable with "fonts" automatically -> therefore switch names around to fix the issue

webpack.config.ts

@@ -33,7 +33,7 @@ const config: Configuration = {
                 {
                     context: "node_modules/@excalidraw/excalidraw/dist/prod/fonts/",
                     from: "**/*",
-                    to: "fonts/excalidraw/"
+                    to: "excalidraw/fonts/"
                 }
             ]
         })