[ARROW-16373] [CI] Small improvements to CI documentation

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 7.0.0
• Fix Version/s: 8.0.0
• Component/s: Continuous Integration
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/31754
• Assignee: Dragoș Moldovan-Grünfeld
• Reporter: Dragoș Moldovan-Grünfeld
• Created: 27/Apr/22 13:38
• Updated: 11/Jan/23 11:43
• Resolved: 27/Apr/22 22:24

Description

We sometimes use "on-demand" to refer to more comprehensive jobs, some of which are run as part of the nightly builds. A more suitable description would be extended instead of on-demand. 

Issue Links

• links to: GitHub Pull Request #12989
• links to: GitHub Pull Request #12989