fix export file naming issue for windows

Author: Narek Mkhitaryan

src/superannotate/lib/core/usecases/models.py

@@ -144,7 +144,7 @@ def execute(self):
 
 
 class DownloadExportUseCase(BaseReportableUseCase):
-    FORBIDDEN_CHARS = "*./\\[]:;|,\"'"
+    FORBIDDEN_CHARS = "*/\\[]:;|,\"'"
 
     def __init__(
         self,