update documentation for pager configuration

**Is your feature request related to a problem? Please describe.**
The [documentation](https://docs.aws.amazon.com/cli/latest/userguide/cli-usage-pagination.html#cli-usage-pagination-clientside) is incorrect for where the pager configuration is read from. It currently states that the pager settings will fall back to the default profile. The configuration for this parameter follows the same logic as all other configuration options.

This was noted in issue #5951.

**Describe the solution you'd like**

Update the documentation.

**Describe alternatives you've considered**

NA

**Additional context**

None