ddl: fix a typo when truncating table partition (#22326)
ddl: fix a typo when truncating table partition (#22326)

Signed-off-by: Xiaoguang Sun <ac8c70efc34e705c6f908e5bc079f77a75790d36@zhihu.com>
ngaut/tidb,c4pt0r/tidb,kyle-wang/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,coocood/tidb,ngaut/tidb,c4pt0r/tidb,ngaut/tidb,pingcap/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,pingcap/tidb,coocood/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb