[KAFKA-13441] improve upgrade doc

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.2.0
• Component/s: documentation
• Assignee: guophilipse
• Reporter: guophilipse
• Created: 10/Nov/21 13:22
• Updated: 15/Nov/21 13:49
• Resolved: 15/Nov/21 13:16

Description

improve upgrade doc

Issue Links

• links to: GitHub Pull Request #11483