[ARROW-12374] [CI][C++][cron] Use Ubuntu 20.04 instead of 16.04

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: C++, Continuous Integration
• Labels: pull-request-available
• Assignee: Kouhei Sutou
• Reporter: Kouhei Sutou
• Created: 14/Apr/21 07:28
• Updated: 14/Apr/21 12:06
• Resolved: 14/Apr/21 12:06

Description

Because we dropped support for Ubuntu 16.04.

Issue Links

• links to: GitHub Pull Request #10021