bugfix: 修改brotli压缩等级

plugin/protocol/http/src/http_convert.cpp

@@ -249,6 +249,8 @@ struct hf_content_compress * hf_content_compress_create(unsigned int content_enc
     {
         cv_object->brenc_state = BrotliEncoderCreateInstance(NULL, NULL, NULL);
         if (unlikely(cv_object->brenc_state == NULL)) goto __errout;
+
+		BrotliEncoderSetParameter(cv_object->brenc_state, BROTLI_PARAM_QUALITY, 3);
     }
 
     return cv_object;