Change list[str] -> str for vectordbs (#1388)

embedchain/vectordb/opensearch.py

@@ -146,7 +146,7 @@ class OpenSearchDB(BaseVectorDB):
 
     def query(
         self,
-        input_query: list[str],
+        input_query: str,
         n_results: int,
         where: dict[str, any],
         citations: bool = False,
@@ -155,8 +155,8 @@ class OpenSearchDB(BaseVectorDB):
         """
         query contents from vector database based on vector similarity
 
-        :param input_query: list of query string
-        :type input_query: list[str]
+        :param input_query: query string
+        :type input_query: str
         :param n_results: no of similar documents to fetch from database
         :type n_results: int
         :param where: Optional. to filter data