Fix more issues with repo type

src/submission_uploader.py

@@ -29,7 +29,9 @@ class SubmissionUploader:
     def _get_previous_pr(self, pr_title: str) -> Optional[Discussion]:
         """Searches among discussions of dataset repo for a PR with the given title."""
         try:
-            discussions = self._api.get_repo_discussions(repo_id=self._dataset_id)
+            discussions = self._api.get_repo_discussions(
+                repo_id=self._dataset_id, repo_type="dataset"
+            )
         except Exception:
             return None
         for discussion in discussions:
@@ -111,7 +113,7 @@ class SubmissionUploader:
 
             prev_pr = self._get_previous_pr(pr_title)
             if prev_pr is not None:
-                url = f"https://huggingface.co/{self._dataset_id}/discussions/{prev_pr.num}"
+                url = f"https://huggingface.co/datasets/{self._dataset_id}/discussions/{prev_pr.num}"
                 raise AlreadyExists(
                     f"{self._dataset_id} already has an open PR for this submission: {url}."
                 )
@@ -140,6 +142,7 @@ class SubmissionUploader:
                 * Submitted By: {submitted_by}
                 """,
             create_pr=True,
+            repo_type="dataset",
         )
         logging.info(f"PR created at {new_pr.pr_url}")