Change docs about array functions to correct directory.
Because we already refractor the docs directory.
```
docs/en/sql-manual/sql-functions/array-functions/ ===>
docs/en/docs/sql-manual/sql-functions/array-functions
```
```
docs/zh-CN/sql-manual/sql-functions/array-functions/ ===>
docs/zh-CN/docs/sql-manual/sql-functions/array-functions/
```
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