Feedback: Read Committed Transactions - obsolete value shown for sql.defaults.results_buffer.size

Page: https://cockroachlabs.com/docs/v25.2/read-committed.html

## What is the reason for your feedback?

[ ] Missing the information I need

[ ] Too complicated

[X] Out of date

[ ] Something is broken

[ ] Other

## Additional details

The page has an obsolete value documented for `sql.defaults.results_buffer.size`. It says:

> By default, the result set is buffered up to 16 KiB before overflowing and being streamed to the client.

Note that this value was increased from 16KiB to 512KiB in 24.1.

From **What's New in v24.1**:

https://www.cockroachlabs.com/docs/releases/v24.1#v24-1-1-sql-language-changes

> The default value of the `sql.defaults.results_buffer.size` [cluster setting](https://www.cockroachlabs.com/docs/v24.1/cluster-settings) has been changed from 16KiB to 512KiB. This reduces the chance that clients using `READ COMMITTED` transactions will encounter errors that cannot automatically be retried within CockroachDB. [#124633](https://github.com/cockroachdb/cockroach/pull/124633)

Jira issue: DOC-13868