Hello @Irfan Azeez ,
Thanks for reaching out and welcome to the community. And 8.5.2 should be coming really soon, however, the question about Atlassian release timelines comes up quite a lot but the most solid answer we can give is that it will release when it is ready to go out.
While 8.5.2 is coming down the pipe as the upcoming release we do not have any specifics other than it is next in line for release in the 8.5 line and you should be seeing it any day now.
We do not have any set deadlines for releases and generally we do not pre-announce specific release dates for our products with the disclaimer that anything that does get pre-announced is subject to change contingent on testing and QA. But do Keep an eye on the release notes and version history pages for the most up to date info on the release when it becomes avaliable: