fix: update content-type for .well-known static files

well_known/views.py

@@ -7,6 +7,6 @@ def serve_text_file(request, file_name):
     try:
         with open(file_path, 'rb') as file:
             content = file.read()
-        return HttpResponse(content, content_type='text/plain')
+        return HttpResponse(content, content_type="text/plain; charset=utf-8")
     except FileNotFoundError:
         return HttpResponse(b"File not found.", status=404)