WarbriT

Results 1 issues of WarbriT

## What is the purpose of the change Typo in metics.md. Modify "numSplitsProcessed" metric type from Gauge to Counter in both english and chinese version. ![image](https://github.com/apache/flink/assets/60968905/f58d0934-b361-4928-88f0-382f9ec0f71b)