[MINOR][DOCS] Match several documentation changes in Scala to R/Python

## What changes were proposed in this pull request?

This PR proposes to match minor documentations changes in https://github.com/apache/spark/pull/17399 and https://github.com/apache/spark/pull/17380 to R/Python.

## How was this patch tested?

Manual tests in Python , Python tests via `./python/run-tests.py --module=pyspark-sql` and lint-checks for Python/R.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #17429 from HyukjinKwon/minor-match-doc.