[docs] update maintainers (#2592)

Co-authored-by: Diego Hurtado <ocelotl@users.noreply.github.com>

README.md

@@ -137,7 +137,6 @@ Approvers ([@open-telemetry/python-approvers](https://github.com/orgs/open-telem
 
 - [Aaron Abbott](https://github.com/aabmass), Google
 - [Alex Boten](https://github.com/codeboten), Lightstep
-- [Srikanth Chekuri](https://github.com/lonewolf3739)
 - [Owais Lone](https://github.com/owais), Splunk
 - [Nathaniel Ruiz Nowell](https://github.com/NathanielRN), AWS
 
@@ -147,6 +146,7 @@ Maintainers ([@open-telemetry/python-maintainers](https://github.com/orgs/open-t
 
 - [Diego Hurtado](https://github.com/ocelotl), Lightstep
 - [Leighton Chen](https://github.com/lzchen), Microsoft
+- [Srikanth Chekuri](https://github.com/srikanthccv)
 
 *For more information about the maintainer role, see the [community repository](https://github.com/open-telemetry/community/blob/main/community-membership.md#maintainer).*