docs: align spilling preference with pingcap/docs (#15098)
docs: align spilling preference with pingcap/docs (#15098)


kyle-wang/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,XuHuaiyu/tidb,ngaut/tidb,EvilMcJerkface/tidb,ngaut/tidb,kyle-wang/tidb,pingcap/tidb,c4pt0r/tidb,coocood/tidb,EvilMcJerkface/tidb,coocood/tidb,kyle-wang/tidb,kyle-wang/tidb,c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,c4pt0r/tidb,pingcap/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,XuHuaiyu/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb