Fix: tag_feas deletion error. (#6257)

### What problem does this PR solve?

#6218

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

rag/utils/es_conn.py

             # update specific single document
             chunkId = condition["id"]
             for i in range(ATTEMPT_TIME):
+                for k in doc.keys():
+                    if "feas" != k.split("_")[-1]:
+                        continue
+                    try:
+                        self.es.update(index=indexName, id=chunkId, script=f"ctx._source.remove(\"{k}\");")
+                    except Exception:
+                        logger.exception(f"ESConnection.update(index={indexName}, id={chunkId}, doc={json.dumps(condition, ensure_ascii=False)}) got exception")
                 try:
                     self.es.update(index=indexName, id=chunkId, doc=doc)
                     return True
                 except Exception as e:
                     logger.exception(
-                        f"ESConnection.update(index={indexName}, id={id}, doc={json.dumps(condition, ensure_ascii=False)}) got exception")
+                        f"ESConnection.update(index={indexName}, id={chunkId}, doc={json.dumps(condition, ensure_ascii=False)}) got exception")
                     if re.search(r"(timeout|connection)", str(e).lower()):
                         continue
                     break