Make the update script shorter. (#4854)

### What problem does this PR solve?


### Type of change

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

rag/utils/es_conn.py

@@ -367,11 +367,13 @@ class ESConnection(DocStoreConnection):
                 continue
             if isinstance(v, str):
                 v = re.sub(r"(['\n\r]|\\.)", " ", v)
-                scripts.append(f"ctx._source.{k}='{v}';")
+                params[f"pp_{k}"] = v
+                scripts.append(f"ctx._source.{k}=params.pp_{k};")
             elif isinstance(v, int) or isinstance(v, float):
                 scripts.append(f"ctx._source.{k}={v};")
             elif isinstance(v, list):
-                scripts.append(f"ctx._source.{k}={json.dumps(v, ensure_ascii=False)};")
+                scripts.append(f"ctx._source.{k}=params.pp_{k};")
+                params[f"pp_{k}"] = json.dumps(v, ensure_ascii=False)
             else:
                 raise Exception(
                     f"newValue `{str(k)}={str(v)}` value type is {str(type(v))}, expected to be int, str.")