[FLINK-30182] Create template for release announcement

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.17.0
• Component/s: Documentation
• Assignee: Matthias Pohl
• Reporter: Matthias Pohl
• Created: 24/Nov/22 03:41
• Updated: 24/Nov/22 05:41
• Resolved: 24/Nov/22 05:41

Description

A question popped up during the 1.15.3 release (see flink-web PR comment) about a template for the release announcement. We should provide something like that in the release docs.