Update @swiatekm's affiliation in the README (open-telemetry#3235)

I now work for Elastic, and wanted to reflect that in the README.

Author: swiatekm

README.md

@@ -815,7 +815,7 @@ Emeritus Target Allocator Maintainers
 Maintainers ([@open-telemetry/operator-maintainers](https://github.com/orgs/open-telemetry/teams/operator-maintainers)):
 
 - [Jacob Aronoff](https://github.com/jaronoff97), Lightstep
-- [Mikołaj Świątek](https://github.com/swiatekm), Sumo Logic
+- [Mikołaj Świątek](https://github.com/swiatekm), Elastic
 - [Pavol Loffay](https://github.com/pavolloffay), Red Hat
 
 Emeritus Maintainers