implemented copilot review

Signed-off-by: Omswastik-11 <omswastikpanda11@gmail.com>

Author: Omswastik-11

openml/_api/resources/flow.py

@@ -112,9 +112,9 @@ def list(
         if offset is not None:
             api_call += f"/offset/{offset}"
         if tag is not None:
-            api_call += f"/tag/{tag}"
+            api_call += f"/tag/{quote(str(tag), safe='')}"
         if uploader is not None:
-            api_call += f"/uploader/{uploader}"
+            api_call += f"/uploader/{quote(str(uploader), safe='')}"
 
         response = self._http.get(api_call)
         xml_string = response.text