Regarding Beam 2.28 release timeline

[Tao Li]

Hi Beam community,

I am looking forward to Beam 2.28 release which will probably include 
BEAM-11527<https://issues.apache.org/jira/browse/BEAM-11527>. We will depend on 
BEAM-11527<https://issues.apache.org/jira/browse/BEAM-11527> for a major work 
item from my side. Can some please provide an ETA of 2.28 release? Thanks so 
much!