readd UploadFile.filename for compat with StarletteUploadFile (#5772)

Author: adhami3310

reflex/app.py

@@ -258,6 +258,15 @@ class UploadFile(StarletteUploadFile):
 
     headers: Headers = dataclasses.field(default_factory=Headers)
 
+    @property
+    def filename(self) -> str | None:
+        """Get the name of the uploaded file.
+
+        Returns:
+            The name of the uploaded file.
+        """
+        return self.name
+
     @property
     def name(self) -> str | None:
         """Get the name of the uploaded file.