[fix](config) change inverted_index_fd_number_limit_percent default value #42224 (#42426)

Author: xiaokang

be/src/common/config.cpp

@@ -1011,7 +1011,7 @@ DEFINE_String(inverted_index_searcher_cache_limit, "10%");
 // set `true` to enable insert searcher into cache when write inverted index data
 DEFINE_Bool(enable_write_index_searcher_cache, "false");
 DEFINE_Bool(enable_inverted_index_cache_check_timestamp, "true");
-DEFINE_Int32(inverted_index_fd_number_limit_percent, "40"); // 40%
+DEFINE_Int32(inverted_index_fd_number_limit_percent, "20"); // 20%
 
 // inverted index match bitmap cache size
 DEFINE_String(inverted_index_query_cache_limit, "10%");