fix: update dashscope embedding batch size (#165)

According to the official dashscope
[documents](https://help.aliyun.com/zh/model-studio/text-embedding-synchronous-api)

---------

Co-authored-by: Mason Daugherty <[email protected]>

Author: codycjy

libs/community/langchain_community/embeddings/dashscope.py

@@ -23,7 +23,12 @@
 
 logger = logging.getLogger(__name__)
 
-BATCH_SIZE = {"text-embedding-v1": 25, "text-embedding-v2": 25, "text-embedding-v3": 6}
+BATCH_SIZE = {
+    "text-embedding-v1": 25,
+    "text-embedding-v2": 25,
+    "text-embedding-v3": 10,
+    "text-embedding-v4": 10,
+}
 
 
 def _create_retry_decorator(embeddings: DashScopeEmbeddings) -> Callable[[Any], Any]: