fix typo

Author: felixcheung

docs/sparkr.md

@@ -718,4 +718,4 @@ You can inspect the search path in R with [`search()`](https://stat.ethz.ch/R-ma
 ## Upgrading to SparkR 3.0.0
 
  - The deprecated methods `sparkR.init`, `sparkRSQL.init`, `sparkRHive.init` have been removed. Use `sparkR.session` instead.
- - The deprecated methods `parquetFile`, `saveAsParquetFile`, `jsonFile`, `registerTempTable`, `createExternalTable`, `dropTempTable`, `unionAll` have been removed. Use `read.parquet`, `write.parquet`, `read.json`, `createOrReplaceTempView`, , `createTable`, `dropTempView`, `union` instead.
+ - The deprecated methods `parquetFile`, `saveAsParquetFile`, `jsonFile`, `registerTempTable`, `createExternalTable`, `dropTempTable`, `unionAll` have been removed. Use `read.parquet`, `write.parquet`, `read.json`, `createOrReplaceTempView`, `createTable`, `dropTempView`, `union` instead.