[FLINK-14639] Metrics User Scope docs refer to wrong class

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.8.0
• Fix Version/s: 1.8.3, 1.9.2, 1.10.0
• Component/s: Documentation, Runtime / Metrics
• Assignee: Chesnay Schepler
• Reporter: hehuiyuan
• Created: 07/Nov/19 02:46
• Updated: 29/Jan/20 08:53
• Resolved: 07/Nov/19 09:50

Description

Hi , i think it should be `MetricGroup{{#addGroup(String key, String value)}}`