fix(jina): remove encoding_format for jina embedding

relay/channel/jina/adaptor.go

@@ -76,6 +76,7 @@ func (a *Adaptor) ConvertRerankRequest(c *gin.Context, relayMode int, request dt
 }
 
 func (a *Adaptor) ConvertEmbeddingRequest(c *gin.Context, info *relaycommon.RelayInfo, request dto.EmbeddingRequest) (any, error) {
+	request.EncodingFormat = ""
 	return request, nil
 }