fix typo

app.py

@@ -200,7 +200,7 @@ async def create_embedding(request: EmbedRequest):
             )
 
         # Dense embedding
-        embedding = model.embed_documents(text=[request.text], prompt=request.prompt)[0]
+        embedding = model.embed_documents(texts=[request.text], prompt=request.prompt)[0]
         processing_time = time.time() - start_time
 
         return EmbedResponse(
@@ -317,4 +317,4 @@ async def root():
     return {
         "message": "Unified Embedding API - Dense & Sparse Embeddings",
         "version": "3.0.0"
-    }
+    }