fix: pg_docs index error in updated test

Author: maxdswain

integrations/pgvector/tests/test_converters.py

@@ -76,10 +76,10 @@ def test_from_haystack_to_pg_documents():
     assert pg_docs[3]["blob_data"] is None
     assert pg_docs[3]["blob_meta"] is None
     assert pg_docs[3]["blob_mime_type"] is None
-    assert "dataframe" not in pg_docs[0]
+    assert "dataframe" not in pg_docs[3]
     assert pg_docs[3]["meta"].obj == {"meta_key": "meta_value"}
     assert pg_docs[3]["embedding"] == [0.7, 0.8, 0.9]
-    assert "score" not in pg_docs[0]
+    assert "score" not in pg_docs[3]
 
 
 def test_from_pg_to_haystack_documents():